diff --git a/api/BUILD.gn b/api/BUILD.gn
index e58f393..2e3d77a 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -198,6 +198,15 @@
   }
 }
 
+rtc_source_set("array_view") {
+  sources = [
+    "array_view.h",
+  ]
+  deps = [
+    "../rtc_base:rtc_base_approved",
+  ]
+}
+
 rtc_source_set("libjingle_peerconnection_test_api") {
   testonly = true
   sources = [
@@ -256,6 +265,7 @@
       visibility = [ "..:rtc_unittests" ]
     }
     sources = [
+      "array_view_unittest.cc",
       "ortc/mediadescription_unittest.cc",
       "ortc/sessiondescription_unittest.cc",
       "rtcerror_unittest.cc",
@@ -268,8 +278,11 @@
     }
 
     deps = [
+      ":array_view",
       ":libjingle_peerconnection_api",
       ":ortc_api",
+      "../rtc_base:rtc_base_approved",
+      "../rtc_base:rtc_base_tests_utils",
       "../test:test_support",
     ]
   }
diff --git a/api/array_view.h b/api/array_view.h
new file mode 100644
index 0000000..c97d388
--- /dev/null
+++ b/api/array_view.h
@@ -0,0 +1,263 @@
+/*
+ *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_API_ARRAY_VIEW_H_
+#define WEBRTC_API_ARRAY_VIEW_H_
+
+#include <algorithm>
+#include <type_traits>
+
+#include "webrtc/rtc_base/checks.h"
+#include "webrtc/rtc_base/type_traits.h"
+
+namespace rtc {
+
+// tl;dr: rtc::ArrayView is the same thing as gsl::span from the Guideline
+//        Support Library.
+//
+// Many functions read from or write to arrays. The obvious way to do this is
+// to use two arguments, a pointer to the first element and an element count:
+//
+//   bool Contains17(const int* arr, size_t size) {
+//     for (size_t i = 0; i < size; ++i) {
+//       if (arr[i] == 17)
+//         return true;
+//     }
+//     return false;
+//   }
+//
+// This is flexible, since it doesn't matter how the array is stored (C array,
+// std::vector, rtc::Buffer, ...), but it's error-prone because the caller has
+// to correctly specify the array length:
+//
+//   Contains17(arr, arraysize(arr));     // C array
+//   Contains17(arr.data(), arr.size());  // std::vector
+//   Contains17(arr, size);               // pointer + size
+//   ...
+//
+// It's also kind of messy to have two separate arguments for what is
+// conceptually a single thing.
+//
+// Enter rtc::ArrayView<T>. It contains a T pointer (to an array it doesn't
+// own) and a count, and supports the basic things you'd expect, such as
+// indexing and iteration. It allows us to write our function like this:
+//
+//   bool Contains17(rtc::ArrayView<const int> arr) {
+//     for (auto e : arr) {
+//       if (e == 17)
+//         return true;
+//     }
+//     return false;
+//   }
+//
+// And even better, because a bunch of things will implicitly convert to
+// ArrayView, we can call it like this:
+//
+//   Contains17(arr);                             // C array
+//   Contains17(arr);                             // std::vector
+//   Contains17(rtc::ArrayView<int>(arr, size));  // pointer + size
+//   Contains17(nullptr);                         // nullptr -> empty ArrayView
+//   ...
+//
+// ArrayView<T> stores both a pointer and a size, but you may also use
+// ArrayView<T, N>, which has a size that's fixed at compile time (which means
+// it only has to store the pointer).
+//
+// One important point is that ArrayView<T> and ArrayView<const T> are
+// different types, which allow and don't allow mutation of the array elements,
+// respectively. The implicit conversions work just like you'd hope, so that
+// e.g. vector<int> will convert to either ArrayView<int> or ArrayView<const
+// int>, but const vector<int> will convert only to ArrayView<const int>.
+// (ArrayView itself can be the source type in such conversions, so
+// ArrayView<int> will convert to ArrayView<const int>.)
+//
+// Note: ArrayView is tiny (just a pointer and a count if variable-sized, just
+// a pointer if fix-sized) and trivially copyable, so it's probably cheaper to
+// pass it by value than by const reference.
+
+namespace impl {
+
+// Magic constant for indicating that the size of an ArrayView is variable
+// instead of fixed.
+enum : std::ptrdiff_t { kArrayViewVarSize = -4711 };
+
+// Base class for ArrayViews of fixed nonzero size.
+template <typename T, std::ptrdiff_t Size>
+class ArrayViewBase {
+  static_assert(Size > 0, "ArrayView size must be variable or non-negative");
+
+ public:
+  ArrayViewBase(T* data, size_t size) : data_(data) {}
+
+  static constexpr size_t size() { return Size; }
+  static constexpr bool empty() { return false; }
+  T* data() const { return data_; }
+
+ protected:
+  static constexpr bool fixed_size() { return true; }
+
+ private:
+  T* data_;
+};
+
+// Specialized base class for ArrayViews of fixed zero size.
+template <typename T>
+class ArrayViewBase<T, 0> {
+ public:
+  explicit ArrayViewBase(T* data, size_t size) {}
+
+  static constexpr size_t size() { return 0; }
+  static constexpr bool empty() { return true; }
+  T* data() const { return nullptr; }
+
+ protected:
+  static constexpr bool fixed_size() { return true; }
+};
+
+// Specialized base class for ArrayViews of variable size.
+template <typename T>
+class ArrayViewBase<T, impl::kArrayViewVarSize> {
+ public:
+  ArrayViewBase(T* data, size_t size)
+      : data_(size == 0 ? nullptr : data), size_(size) {}
+
+  size_t size() const { return size_; }
+  bool empty() const { return size_ == 0; }
+  T* data() const { return data_; }
+
+ protected:
+  static constexpr bool fixed_size() { return false; }
+
+ private:
+  T* data_;
+  size_t size_;
+};
+
+}  // namespace impl
+
+template <typename T, std::ptrdiff_t Size = impl::kArrayViewVarSize>
+class ArrayView final : public impl::ArrayViewBase<T, Size> {
+ public:
+  using value_type = T;
+  using const_iterator = const T*;
+
+  // Construct an ArrayView from a pointer and a length.
+  template <typename U>
+  ArrayView(U* data, size_t size)
+      : impl::ArrayViewBase<T, Size>::ArrayViewBase(data, size) {
+    RTC_DCHECK_EQ(size == 0 ? nullptr : data, this->data());
+    RTC_DCHECK_EQ(size, this->size());
+    RTC_DCHECK_EQ(!this->data(),
+                  this->size() == 0);  // data is null iff size == 0.
+  }
+
+  // Construct an empty ArrayView. Note that fixed-size ArrayViews of size > 0
+  // cannot be empty.
+  ArrayView() : ArrayView(nullptr, 0) {}
+  ArrayView(std::nullptr_t)  // NOLINT
+      : ArrayView() {}
+  ArrayView(std::nullptr_t, size_t size)
+      : ArrayView(static_cast<T*>(nullptr), size) {
+    static_assert(Size == 0 || Size == impl::kArrayViewVarSize, "");
+    RTC_DCHECK_EQ(0, size);
+  }
+
+  // Construct an ArrayView from an array.
+  template <typename U, size_t N>
+  ArrayView(U (&array)[N])  // NOLINT
+      : ArrayView(array, N) {
+    static_assert(Size == N || Size == impl::kArrayViewVarSize,
+                  "Array size must match ArrayView size");
+  }
+
+  // (Only if size is fixed.) Construct an ArrayView from any type U that has a
+  // static constexpr size() method whose return value is equal to Size, and a
+  // data() method whose return value converts implicitly to T*. In particular,
+  // this means we allow conversion from ArrayView<T, N> to ArrayView<const T,
+  // N>, but not the other way around. We also don't allow conversion from
+  // ArrayView<T> to ArrayView<T, N>, or from ArrayView<T, M> to ArrayView<T,
+  // N> when M != N.
+  template <
+      typename U,
+      typename std::enable_if<Size != impl::kArrayViewVarSize &&
+                              HasDataAndSize<U, T>::value>::type* = nullptr>
+  ArrayView(U& u)  // NOLINT
+      : ArrayView(u.data(), u.size()) {
+    static_assert(U::size() == Size, "Sizes must match exactly");
+  }
+
+  // (Only if size is variable.) Construct an ArrayView from any type U that
+  // has a size() method whose return value converts implicitly to size_t, and
+  // a data() method whose return value converts implicitly to T*. In
+  // particular, this means we allow conversion from ArrayView<T> to
+  // ArrayView<const T>, but not the other way around. Other allowed
+  // conversions include
+  // ArrayView<T, N> to ArrayView<T> or ArrayView<const T>,
+  // std::vector<T> to ArrayView<T> or ArrayView<const T>,
+  // const std::vector<T> to ArrayView<const T>,
+  // rtc::Buffer to ArrayView<uint8_t> or ArrayView<const uint8_t>, and
+  // const rtc::Buffer to ArrayView<const uint8_t>.
+  template <
+      typename U,
+      typename std::enable_if<Size == impl::kArrayViewVarSize &&
+                              HasDataAndSize<U, T>::value>::type* = nullptr>
+  ArrayView(U& u)  // NOLINT
+      : ArrayView(u.data(), u.size()) {}
+
+  // Indexing and iteration. These allow mutation even if the ArrayView is
+  // const, because the ArrayView doesn't own the array. (To prevent mutation,
+  // use a const element type.)
+  T& operator[](size_t idx) const {
+    RTC_DCHECK_LT(idx, this->size());
+    RTC_DCHECK(this->data());
+    return this->data()[idx];
+  }
+  T* begin() const { return this->data(); }
+  T* end() const { return this->data() + this->size(); }
+  const T* cbegin() const { return this->data(); }
+  const T* cend() const { return this->data() + this->size(); }
+
+  ArrayView<T> subview(size_t offset, size_t size) const {
+    return offset < this->size()
+               ? ArrayView<T>(this->data() + offset,
+                              std::min(size, this->size() - offset))
+               : ArrayView<T>();
+  }
+  ArrayView<T> subview(size_t offset) const {
+    return subview(offset, this->size());
+  }
+};
+
+// Comparing two ArrayViews compares their (pointer,size) pairs; it does *not*
+// dereference the pointers.
+template <typename T, std::ptrdiff_t Size1, std::ptrdiff_t Size2>
+bool operator==(const ArrayView<T, Size1>& a, const ArrayView<T, Size2>& b) {
+  return a.data() == b.data() && a.size() == b.size();
+}
+template <typename T, std::ptrdiff_t Size1, std::ptrdiff_t Size2>
+bool operator!=(const ArrayView<T, Size1>& a, const ArrayView<T, Size2>& b) {
+  return !(a == b);
+}
+
+// Variable-size ArrayViews are the size of two pointers; fixed-size ArrayViews
+// are the size of one pointer. (And as a special case, fixed-size ArrayViews
+// of size 0 require no storage.)
+static_assert(sizeof(ArrayView<int>) == 2 * sizeof(int*), "");
+static_assert(sizeof(ArrayView<int, 17>) == sizeof(int*), "");
+static_assert(std::is_empty<ArrayView<int, 0>>::value, "");
+
+template <typename T>
+inline ArrayView<T> MakeArrayView(T* data, size_t size) {
+  return ArrayView<T>(data, size);
+}
+
+}  // namespace rtc
+
+#endif  // WEBRTC_API_ARRAY_VIEW_H_
diff --git a/rtc_base/array_view_unittest.cc b/api/array_view_unittest.cc
similarity index 99%
rename from rtc_base/array_view_unittest.cc
rename to api/array_view_unittest.cc
index 6c30bef..b19abc1 100644
--- a/rtc_base/array_view_unittest.cc
+++ b/api/array_view_unittest.cc
@@ -10,9 +10,10 @@
 
 #include <algorithm>
 #include <string>
+#include <utility>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/gunit.h"
diff --git a/api/audio_codecs/BUILD.gn b/api/audio_codecs/BUILD.gn
index 3ed6396..29238e6 100644
--- a/api/audio_codecs/BUILD.gn
+++ b/api/audio_codecs/BUILD.gn
@@ -26,6 +26,7 @@
     "audio_format.h",
   ]
   deps = [
+    "..:array_view",
     "../..:webrtc_common",
     "../../rtc_base:rtc_base_approved",
   ]
diff --git a/api/audio_codecs/audio_decoder.cc b/api/audio_codecs/audio_decoder.cc
index 98dd496..b25e85b 100644
--- a/api/audio_codecs/audio_decoder.cc
+++ b/api/audio_codecs/audio_decoder.cc
@@ -14,7 +14,7 @@
 #include <memory>
 #include <utility>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/sanitizer.h"
 #include "webrtc/rtc_base/trace_event.h"
diff --git a/api/audio_codecs/audio_decoder.h b/api/audio_codecs/audio_decoder.h
index d671839..0d15e6d 100644
--- a/api/audio_codecs/audio_decoder.h
+++ b/api/audio_codecs/audio_decoder.h
@@ -14,7 +14,7 @@
 #include <memory>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/optional.h"
diff --git a/api/audio_codecs/audio_encoder.h b/api/audio_codecs/audio_encoder.h
index bd8c7de..37a03d0 100644
--- a/api/audio_codecs/audio_encoder.h
+++ b/api/audio_codecs/audio_encoder.h
@@ -16,7 +16,7 @@
 #include <string>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/rtc_base/deprecation.h"
 #include "webrtc/rtc_base/optional.h"
diff --git a/call/BUILD.gn b/call/BUILD.gn
index 19bc218..580d606 100644
--- a/call/BUILD.gn
+++ b/call/BUILD.gn
@@ -45,6 +45,7 @@
     "rtp_transport_controller_send_interface.h",
   ]
   deps = [
+    "../api:array_view",
     "../rtc_base:rtc_base_approved",
   ]
 }
@@ -66,6 +67,7 @@
   deps = [
     ":rtp_interfaces",
     "..:webrtc_common",
+    "../api:array_view",
     "../modules/rtp_rtcp",
     "../rtc_base:rtc_base_approved",
   ]
@@ -175,6 +177,7 @@
       ":rtp_receiver",
       ":rtp_sender",
       "..:webrtc_common",
+      "../api:array_view",
       "../api:mock_audio_mixer",
       "../logging:rtc_event_log_api",
       "../modules/audio_device:mock_audio_device",
diff --git a/call/flexfec_receive_stream_unittest.cc b/call/flexfec_receive_stream_unittest.cc
index 9c5a691..c3bf2e0 100644
--- a/call/flexfec_receive_stream_unittest.cc
+++ b/call/flexfec_receive_stream_unittest.cc
@@ -13,6 +13,7 @@
 #include <stdint.h>
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/call/rtp_stream_receiver_controller.h"
 #include "webrtc/modules/pacing/packet_router.h"
 #include "webrtc/modules/rtp_rtcp/include/flexfec_receiver.h"
@@ -21,7 +22,6 @@
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_header_extensions.h"
 #include "webrtc/modules/utility/include/mock/mock_process_thread.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/ptr_util.h"
 #include "webrtc/test/gmock.h"
 #include "webrtc/test/gtest.h"
diff --git a/call/rtcp_demuxer.h b/call/rtcp_demuxer.h
index 1919c2b..7b5af9f 100644
--- a/call/rtcp_demuxer.h
+++ b/call/rtcp_demuxer.h
@@ -15,8 +15,8 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/call/ssrc_binding_observer.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/basictypes.h"
 
 namespace webrtc {
diff --git a/call/rtcp_packet_sink_interface.h b/call/rtcp_packet_sink_interface.h
index 1b3cfba..22a404d 100644
--- a/call/rtcp_packet_sink_interface.h
+++ b/call/rtcp_packet_sink_interface.h
@@ -10,7 +10,7 @@
 #ifndef WEBRTC_CALL_RTCP_PACKET_SINK_INTERFACE_H_
 #define WEBRTC_CALL_RTCP_PACKET_SINK_INTERFACE_H_
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 
 namespace webrtc {
 
diff --git a/call/rtp_rtcp_demuxer_helper.h b/call/rtp_rtcp_demuxer_helper.h
index b097d10..02d08aa 100644
--- a/call/rtp_rtcp_demuxer_helper.h
+++ b/call/rtp_rtcp_demuxer_helper.h
@@ -15,7 +15,7 @@
 #include <map>
 #include <utility>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/basictypes.h"
 #include "webrtc/rtc_base/optional.h"
 
diff --git a/common_types.h b/common_types.h
index 868bee4..229d858 100644
--- a/common_types.h
+++ b/common_types.h
@@ -17,10 +17,10 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/video/video_content_type.h"
 #include "webrtc/api/video/video_rotation.h"
 #include "webrtc/api/video/video_timing.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/deprecation.h"
 #include "webrtc/rtc_base/optional.h"
diff --git a/modules/audio_coding/BUILD.gn b/modules/audio_coding/BUILD.gn
index 569d214..8d92c46 100644
--- a/modules/audio_coding/BUILD.gn
+++ b/modules/audio_coding/BUILD.gn
@@ -46,6 +46,7 @@
   ]
   deps = [
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../api/audio_codecs:audio_codecs_api",
     "../../rtc_base:rtc_base_approved",
   ]
@@ -59,6 +60,7 @@
     "acm2/rent_a_codec.h",
   ]
   deps = [
+           "../../api:array_view",
            "../../api/audio_codecs:audio_codecs_api",
            "../..:webrtc_common",
            "../../rtc_base:protobuf_utils",
@@ -123,6 +125,7 @@
 
   deps = audio_coding_deps + [
            "..:module_api",
+           "../../api:array_view",
            "../../api/audio_codecs:audio_codecs_api",
            "../../api/audio_codecs:builtin_audio_decoder_factory",
            ":audio_coding_module_typedefs",
@@ -140,6 +143,7 @@
     "codecs/legacy_encoded_audio_frame.h",
   ]
   deps = [
+    "../../api:array_view",
     "../../api/audio_codecs:audio_codecs_api",
     "../../rtc_base:rtc_base_approved",
   ]
@@ -164,6 +168,7 @@
 
   deps = [
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../api/audio_codecs:audio_codecs_api",
     "../../common_audio",
     "../../rtc_base:rtc_base_approved",
@@ -1111,6 +1116,7 @@
     ":pcm16b",
     "..:module_api",
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../common_audio",
     "../../rtc_base:rtc_base_approved",
     "../../rtc_base:rtc_base_tests_utils",
@@ -1159,6 +1165,7 @@
 
   deps = [
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../api/audio_codecs:audio_codecs_api",
     "../../common_audio",
     "../../rtc_base:rtc_base_approved",
diff --git a/modules/audio_coding/acm2/acm_receiver.h b/modules/audio_coding/acm2/acm_receiver.h
index f51f9b7..5acb013 100644
--- a/modules/audio_coding/acm2/acm_receiver.h
+++ b/modules/audio_coding/acm2/acm_receiver.h
@@ -16,13 +16,13 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_audio/vad/include/webrtc_vad.h"
 #include "webrtc/modules/audio_coding/acm2/acm_resampler.h"
 #include "webrtc/modules/audio_coding/acm2/call_statistics.h"
 #include "webrtc/modules/audio_coding/include/audio_coding_module.h"
 #include "webrtc/modules/audio_coding/neteq/include/neteq.h"
 #include "webrtc/modules/include/module_common_types.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/rtc_base/thread_annotations.h"
diff --git a/modules/audio_coding/acm2/rent_a_codec.h b/modules/audio_coding/acm2/rent_a_codec.h
index a9ed85c..3dd9dc8 100644
--- a/modules/audio_coding/acm2/rent_a_codec.h
+++ b/modules/audio_coding/acm2/rent_a_codec.h
@@ -15,11 +15,11 @@
 #include <map>
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/audio_codecs/audio_decoder.h"
 #include "webrtc/api/audio_codecs/audio_encoder.h"
 #include "webrtc/modules/audio_coding/include/audio_coding_module_typedefs.h"
 #include "webrtc/modules/audio_coding/neteq/neteq_decoder_enum.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/rtc_base/scoped_ref_ptr.h"
diff --git a/modules/audio_coding/codecs/audio_format_conversion.cc b/modules/audio_coding/codecs/audio_format_conversion.cc
index af58bc4..17f8d96 100644
--- a/modules/audio_coding/codecs/audio_format_conversion.cc
+++ b/modules/audio_coding/codecs/audio_format_conversion.cc
@@ -12,7 +12,7 @@
 
 #include <string.h>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/rtc_base/safe_conversions.h"
diff --git a/modules/audio_coding/codecs/cng/webrtc_cng.h b/modules/audio_coding/codecs/cng/webrtc_cng.h
index c751341..98231e7 100644
--- a/modules/audio_coding/codecs/cng/webrtc_cng.h
+++ b/modules/audio_coding/codecs/cng/webrtc_cng.h
@@ -14,7 +14,7 @@
 
 #include <cstddef>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/typedefs.h"
 
diff --git a/modules/audio_coding/codecs/legacy_encoded_audio_frame.h b/modules/audio_coding/codecs/legacy_encoded_audio_frame.h
index 65f4654..e8ea029 100644
--- a/modules/audio_coding/codecs/legacy_encoded_audio_frame.h
+++ b/modules/audio_coding/codecs/legacy_encoded_audio_frame.h
@@ -13,8 +13,8 @@
 
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/audio_codecs/audio_decoder.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_coding/neteq/tools/audio_loop.h b/modules/audio_coding/neteq/tools/audio_loop.h
index 2c4aed8..d226df4 100644
--- a/modules/audio_coding/neteq/tools/audio_loop.h
+++ b/modules/audio_coding/neteq/tools/audio_loop.h
@@ -14,7 +14,7 @@
 #include <memory>
 #include <string>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/typedefs.h"
 
diff --git a/modules/audio_coding/neteq/tools/fake_decode_from_file.h b/modules/audio_coding/neteq/tools/fake_decode_from_file.h
index d39af1e..d293ecd 100644
--- a/modules/audio_coding/neteq/tools/fake_decode_from_file.h
+++ b/modules/audio_coding/neteq/tools/fake_decode_from_file.h
@@ -13,9 +13,9 @@
 
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/audio_codecs/audio_decoder.h"
 #include "webrtc/modules/audio_coding/neteq/tools/input_audio_file.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/optional.h"
 
 namespace webrtc {
diff --git a/modules/audio_device/BUILD.gn b/modules/audio_device/BUILD.gn
index 1569eb2..b9716ae 100644
--- a/modules/audio_device/BUILD.gn
+++ b/modules/audio_device/BUILD.gn
@@ -51,6 +51,7 @@
   deps = [
     "..:module_api",
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../common_audio",
     "../../rtc_base:rtc_base_approved",
     "../../rtc_base:rtc_task_queue",
@@ -281,6 +282,7 @@
     deps = [
       ":audio_device",
       ":mock_audio_device",
+      "../../api:array_view",
       "../../rtc_base:rtc_base_approved",
       "../../system_wrappers:system_wrappers",
       "../../test:test_support",
diff --git a/modules/audio_device/android/opensles_player.cc b/modules/audio_device/android/opensles_player.cc
index 0ffb259..513f823 100644
--- a/modules/audio_device/android/opensles_player.cc
+++ b/modules/audio_device/android/opensles_player.cc
@@ -12,10 +12,10 @@
 
 #include <android/log.h>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_device/android/audio_common.h"
 #include "webrtc/modules/audio_device/android/audio_manager.h"
 #include "webrtc/modules/audio_device/fine_audio_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/format_macros.h"
diff --git a/modules/audio_device/android/opensles_recorder.cc b/modules/audio_device/android/opensles_recorder.cc
index b180254..e3a6e61 100644
--- a/modules/audio_device/android/opensles_recorder.cc
+++ b/modules/audio_device/android/opensles_recorder.cc
@@ -12,10 +12,10 @@
 
 #include <android/log.h>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_device/android/audio_common.h"
 #include "webrtc/modules/audio_device/android/audio_manager.h"
 #include "webrtc/modules/audio_device/fine_audio_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/format_macros.h"
diff --git a/modules/audio_device/audio_device_unittest.cc b/modules/audio_device/audio_device_unittest.cc
index 1327cda..67e9f47 100644
--- a/modules/audio_device/audio_device_unittest.cc
+++ b/modules/audio_device/audio_device_unittest.cc
@@ -12,10 +12,10 @@
 #include <cstring>
 #include <numeric>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_device/audio_device_impl.h"
 #include "webrtc/modules/audio_device/include/audio_device.h"
 #include "webrtc/modules/audio_device/include/mock_audio_transport.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/event.h"
diff --git a/modules/audio_device/fine_audio_buffer.h b/modules/audio_device/fine_audio_buffer.h
index f2ee20f..df806db 100644
--- a/modules/audio_device/fine_audio_buffer.h
+++ b/modules/audio_device/fine_audio_buffer.h
@@ -13,7 +13,7 @@
 
 #include <memory>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/typedefs.h"
 
diff --git a/modules/audio_device/fine_audio_buffer_unittest.cc b/modules/audio_device/fine_audio_buffer_unittest.cc
index 21043ea..ada14e0 100644
--- a/modules/audio_device/fine_audio_buffer_unittest.cc
+++ b/modules/audio_device/fine_audio_buffer_unittest.cc
@@ -13,8 +13,8 @@
 #include <limits.h>
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_device/mock_audio_device_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gmock.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/audio_device/ios/audio_device_ios.mm b/modules/audio_device/ios/audio_device_ios.mm
index fb2f65d..81558b5 100644
--- a/modules/audio_device/ios/audio_device_ios.mm
+++ b/modules/audio_device/ios/audio_device_ios.mm
@@ -15,8 +15,8 @@
 
 #include <cmath>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_device/fine_audio_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/atomicops.h"
 #include "webrtc/rtc_base/bind.h"
 #include "webrtc/rtc_base/checks.h"
diff --git a/modules/audio_mixer/BUILD.gn b/modules/audio_mixer/BUILD.gn
index e7323f1..5b03a9a 100644
--- a/modules/audio_mixer/BUILD.gn
+++ b/modules/audio_mixer/BUILD.gn
@@ -40,6 +40,7 @@
     ":audio_frame_manipulator",
     "..:module_api",
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../audio/utility:audio_frame_operations",
     "../../rtc_base:rtc_base_approved",
     "../../system_wrappers",
@@ -88,6 +89,7 @@
       ":audio_frame_manipulator",
       ":audio_mixer_impl",
       "..:module_api",
+      "../../api:array_view",
       "../../api:audio_mixer_api",
       "../../audio/utility:audio_frame_operations",
       "../../rtc_base:rtc_base_approved",
diff --git a/modules/audio_mixer/frame_combiner.cc b/modules/audio_mixer/frame_combiner.cc
index 35b9949..ad9ddaf 100644
--- a/modules/audio_mixer/frame_combiner.cc
+++ b/modules/audio_mixer/frame_combiner.cc
@@ -15,10 +15,10 @@
 #include <functional>
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/audio/utility/audio_frame_operations.h"
 #include "webrtc/modules/audio_mixer/audio_frame_manipulator.h"
 #include "webrtc/modules/audio_mixer/audio_mixer_impl.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/logging.h"
 
diff --git a/modules/audio_mixer/gain_change_calculator.h b/modules/audio_mixer/gain_change_calculator.h
index cb742cd..e234384 100644
--- a/modules/audio_mixer/gain_change_calculator.h
+++ b/modules/audio_mixer/gain_change_calculator.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_MIXER_GAIN_CHANGE_CALCULATOR_H_
 #define WEBRTC_MODULES_AUDIO_MIXER_GAIN_CHANGE_CALCULATOR_H_
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/BUILD.gn b/modules/audio_processing/BUILD.gn
index 204a988..e0719b4 100644
--- a/modules/audio_processing/BUILD.gn
+++ b/modules/audio_processing/BUILD.gn
@@ -237,6 +237,7 @@
     ":aec_dump_interface",
     "..:module_api",
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../audio/utility:audio_frame_operations",
     "../../rtc_base:gtest_prod",
     "../../rtc_base:protobuf_utils",
@@ -316,6 +317,7 @@
   ]
 
   deps = [
+    "../../api:array_view",
     "../../rtc_base:rtc_base_approved",
   ]
 }
@@ -550,6 +552,7 @@
       ":audioproc_test_utils",
       "..:module_api",
       "../..:webrtc_common",
+      "../../api:array_view",
       "../../common_audio:common_audio",
       "../../rtc_base:gtest_prod",
       "../../rtc_base:protobuf_utils",
@@ -774,6 +777,7 @@
     deps = [
       ":audio_processing",
       "..:module_api",
+      "../../api:array_view",
       "../../common_audio",
       "../../rtc_base:rtc_base_approved",
       "../../system_wrappers:system_wrappers",
diff --git a/modules/audio_processing/aec3/adaptive_fir_filter.h b/modules/audio_processing/aec3/adaptive_fir_filter.h
index 6fae158..ee2cbbd 100644
--- a/modules/audio_processing/aec3/adaptive_fir_filter.h
+++ b/modules/audio_processing/aec3/adaptive_fir_filter.h
@@ -15,12 +15,12 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
 #include "webrtc/modules/audio_processing/aec3/fft_data.h"
 #include "webrtc/modules/audio_processing/aec3/render_buffer.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/aec3_fft.h b/modules/audio_processing/aec3/aec3_fft.h
index f0b98b3..d8531d2 100644
--- a/modules/audio_processing/aec3/aec3_fft.h
+++ b/modules/audio_processing/aec3/aec3_fft.h
@@ -13,10 +13,10 @@
 
 #include <array>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/fft_data.h"
 #include "webrtc/modules/audio_processing/utility/ooura_fft.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/aec_state.cc b/modules/audio_processing/aec3/aec_state.cc
index d4a3c76..8323099 100644
--- a/modules/audio_processing/aec3/aec_state.cc
+++ b/modules/audio_processing/aec3/aec_state.cc
@@ -14,8 +14,8 @@
 #include <numeric>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/atomicops.h"
 #include "webrtc/rtc_base/checks.h"
 
diff --git a/modules/audio_processing/aec3/aec_state.h b/modules/audio_processing/aec3/aec_state.h
index 44a1767..8dc4530 100644
--- a/modules/audio_processing/aec3/aec_state.h
+++ b/modules/audio_processing/aec3/aec_state.h
@@ -15,13 +15,13 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/echo_path_variability.h"
 #include "webrtc/modules/audio_processing/aec3/erl_estimator.h"
 #include "webrtc/modules/audio_processing/aec3/erle_estimator.h"
 #include "webrtc/modules/audio_processing/aec3/render_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/optional.h"
 
diff --git a/modules/audio_processing/aec3/block_framer.h b/modules/audio_processing/aec3/block_framer.h
index d6c9144..de7c79a 100644
--- a/modules/audio_processing/aec3/block_framer.h
+++ b/modules/audio_processing/aec3/block_framer.h
@@ -13,8 +13,8 @@
 
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/cascaded_biquad_filter.h b/modules/audio_processing/aec3/cascaded_biquad_filter.h
index 8e11a8d..997e6ea 100644
--- a/modules/audio_processing/aec3/cascaded_biquad_filter.h
+++ b/modules/audio_processing/aec3/cascaded_biquad_filter.h
@@ -13,7 +13,7 @@
 
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/decimator_by_4.h b/modules/audio_processing/aec3/decimator_by_4.h
index 93b4b58..cafe82c 100644
--- a/modules/audio_processing/aec3/decimator_by_4.h
+++ b/modules/audio_processing/aec3/decimator_by_4.h
@@ -13,9 +13,9 @@
 
 #include <array>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/cascaded_biquad_filter.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/echo_remover.cc b/modules/audio_processing/aec3/echo_remover.cc
index 6380a96..bac3704 100644
--- a/modules/audio_processing/aec3/echo_remover.cc
+++ b/modules/audio_processing/aec3/echo_remover.cc
@@ -15,6 +15,7 @@
 #include <numeric>
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/aec_state.h"
 #include "webrtc/modules/audio_processing/aec3/comfort_noise_generator.h"
@@ -29,7 +30,6 @@
 #include "webrtc/modules/audio_processing/aec3/suppression_filter.h"
 #include "webrtc/modules/audio_processing/aec3/suppression_gain.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/atomicops.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
diff --git a/modules/audio_processing/aec3/fft_data.h b/modules/audio_processing/aec3/fft_data.h
index b5dfe24..bfd182b 100644
--- a/modules/audio_processing/aec3/fft_data.h
+++ b/modules/audio_processing/aec3/fft_data.h
@@ -18,8 +18,8 @@
 #include <algorithm>
 #include <array>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/aec3/frame_blocker.h b/modules/audio_processing/aec3/frame_blocker.h
index 7b29071..d7cfd09 100644
--- a/modules/audio_processing/aec3/frame_blocker.h
+++ b/modules/audio_processing/aec3/frame_blocker.h
@@ -14,8 +14,8 @@
 #include <stddef.h>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/matched_filter_lag_aggregator_unittest.cc b/modules/audio_processing/aec3/matched_filter_lag_aggregator_unittest.cc
index 1c2e5ab..0144bf4 100644
--- a/modules/audio_processing/aec3/matched_filter_lag_aggregator_unittest.cc
+++ b/modules/audio_processing/aec3/matched_filter_lag_aggregator_unittest.cc
@@ -14,9 +14,9 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/mock/mock_render_delay_controller.h b/modules/audio_processing/aec3/mock/mock_render_delay_controller.h
index 6a00b5e..46a59dc 100644
--- a/modules/audio_processing/aec3/mock/mock_render_delay_controller.h
+++ b/modules/audio_processing/aec3/mock/mock_render_delay_controller.h
@@ -11,9 +11,9 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_RENDER_DELAY_CONTROLLER_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_MOCK_MOCK_RENDER_DELAY_CONTROLLER_H_
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/downsampled_render_buffer.h"
 #include "webrtc/modules/audio_processing/aec3/render_delay_controller.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/test/gmock.h"
 
diff --git a/modules/audio_processing/aec3/output_selector.h b/modules/audio_processing/aec3/output_selector.h
index 8876e23..920280a 100644
--- a/modules/audio_processing/aec3/output_selector.h
+++ b/modules/audio_processing/aec3/output_selector.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_OUTPUT_SELECTOR_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_OUTPUT_SELECTOR_H_
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/render_buffer.h b/modules/audio_processing/aec3/render_buffer.h
index ba7aa53..bc88767 100644
--- a/modules/audio_processing/aec3/render_buffer.h
+++ b/modules/audio_processing/aec3/render_buffer.h
@@ -14,9 +14,9 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
 #include "webrtc/modules/audio_processing/aec3/fft_data.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/render_delay_buffer.h b/modules/audio_processing/aec3/render_delay_buffer.h
index 17a75da..865a00d 100644
--- a/modules/audio_processing/aec3/render_delay_buffer.h
+++ b/modules/audio_processing/aec3/render_delay_buffer.h
@@ -15,11 +15,11 @@
 #include <array>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/downsampled_render_buffer.h"
 #include "webrtc/modules/audio_processing/aec3/fft_data.h"
 #include "webrtc/modules/audio_processing/aec3/render_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/aec3/render_delay_buffer_unittest.cc b/modules/audio_processing/aec3/render_delay_buffer_unittest.cc
index 4a16fee..120ddb2 100644
--- a/modules/audio_processing/aec3/render_delay_buffer_unittest.cc
+++ b/modules/audio_processing/aec3/render_delay_buffer_unittest.cc
@@ -15,9 +15,9 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/audio_processing/aec3/render_delay_controller.h b/modules/audio_processing/aec3/render_delay_controller.h
index ef0aaac..c1e2229 100644
--- a/modules/audio_processing/aec3/render_delay_controller.h
+++ b/modules/audio_processing/aec3/render_delay_controller.h
@@ -11,11 +11,11 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RENDER_DELAY_CONTROLLER_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_RENDER_DELAY_CONTROLLER_H_
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/downsampled_render_buffer.h"
 #include "webrtc/modules/audio_processing/aec3/render_delay_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/optional.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/render_signal_analyzer_unittest.cc b/modules/audio_processing/aec3/render_signal_analyzer_unittest.cc
index d6701e2..e1f1e0f 100644
--- a/modules/audio_processing/aec3/render_signal_analyzer_unittest.cc
+++ b/modules/audio_processing/aec3/render_signal_analyzer_unittest.cc
@@ -14,12 +14,12 @@
 #include <array>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_fft.h"
 #include "webrtc/modules/audio_processing/aec3/fft_data.h"
 #include "webrtc/modules/audio_processing/aec3/render_buffer.h"
 #include "webrtc/modules/audio_processing/test/echo_canceller_test_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/audio_processing/aec3/residual_echo_estimator.h b/modules/audio_processing/aec3/residual_echo_estimator.h
index 5d2835d..0e86ac1 100644
--- a/modules/audio_processing/aec3/residual_echo_estimator.h
+++ b/modules/audio_processing/aec3/residual_echo_estimator.h
@@ -15,11 +15,11 @@
 #include <array>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
 #include "webrtc/modules/audio_processing/aec3/aec_state.h"
 #include "webrtc/modules/audio_processing/aec3/render_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/aec3/subtractor.cc b/modules/audio_processing/aec3/subtractor.cc
index 20ba510..f63505f 100644
--- a/modules/audio_processing/aec3/subtractor.cc
+++ b/modules/audio_processing/aec3/subtractor.cc
@@ -12,8 +12,8 @@
 
 #include <algorithm>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/safe_minmax.h"
 
diff --git a/modules/audio_processing/aec3/vector_math.h b/modules/audio_processing/aec3/vector_math.h
index 008aa86..d1a7e51 100644
--- a/modules/audio_processing/aec3/vector_math.h
+++ b/modules/audio_processing/aec3/vector_math.h
@@ -23,8 +23,8 @@
 #include <array>
 #include <functional>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/aec3/aec3_common.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/agc2/digital_gain_applier.h b/modules/audio_processing/agc2/digital_gain_applier.h
index d9ad1d9..d74ba33 100644
--- a/modules/audio_processing/agc2/digital_gain_applier.h
+++ b/modules/audio_processing/agc2/digital_gain_applier.h
@@ -11,8 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_DIGITAL_GAIN_APPLIER_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_DIGITAL_GAIN_APPLIER_H_
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/agc2/gain_controller2_unittest.cc b/modules/audio_processing/agc2/gain_controller2_unittest.cc
index faa8d16..7668d23 100644
--- a/modules/audio_processing/agc2/gain_controller2_unittest.cc
+++ b/modules/audio_processing/agc2/gain_controller2_unittest.cc
@@ -11,10 +11,10 @@
 #include <memory>
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/agc2/digital_gain_applier.h"
 #include "webrtc/modules/audio_processing/agc2/gain_controller2.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/audio_processing_impl_locking_unittest.cc b/modules/audio_processing/audio_processing_impl_locking_unittest.cc
index f8707c3..4189d6f 100644
--- a/modules/audio_processing/audio_processing_impl_locking_unittest.cc
+++ b/modules/audio_processing/audio_processing_impl_locking_unittest.cc
@@ -14,9 +14,9 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/test/test_utils.h"
 #include "webrtc/modules/include/module_common_types.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/event.h"
 #include "webrtc/rtc_base/platform_thread.h"
diff --git a/modules/audio_processing/audio_processing_performance_unittest.cc b/modules/audio_processing/audio_processing_performance_unittest.cc
index e478c72..2f641de 100644
--- a/modules/audio_processing/audio_processing_performance_unittest.cc
+++ b/modules/audio_processing/audio_processing_performance_unittest.cc
@@ -15,9 +15,9 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/test/test_utils.h"
 #include "webrtc/modules/include/module_common_types.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/atomicops.h"
 #include "webrtc/rtc_base/platform_thread.h"
 #include "webrtc/rtc_base/random.h"
diff --git a/modules/audio_processing/beamformer/nonlinear_beamformer_unittest.cc b/modules/audio_processing/beamformer/nonlinear_beamformer_unittest.cc
index c81d76c..bb1f0ef 100644
--- a/modules/audio_processing/beamformer/nonlinear_beamformer_unittest.cc
+++ b/modules/audio_processing/beamformer/nonlinear_beamformer_unittest.cc
@@ -15,10 +15,10 @@
 
 #include <math.h>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/echo_cancellation_bit_exact_unittest.cc b/modules/audio_processing/echo_cancellation_bit_exact_unittest.cc
index a4bc4f6..c4cd768 100644
--- a/modules/audio_processing/echo_cancellation_bit_exact_unittest.cc
+++ b/modules/audio_processing/echo_cancellation_bit_exact_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/echo_cancellation_impl.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/echo_control_mobile_unittest.cc b/modules/audio_processing/echo_control_mobile_unittest.cc
index aa4ad3c..9941eca 100644
--- a/modules/audio_processing/echo_control_mobile_unittest.cc
+++ b/modules/audio_processing/echo_control_mobile_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/echo_control_mobile_impl.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/gain_control_unittest.cc b/modules/audio_processing/gain_control_unittest.cc
index e047c10..c0c5269 100644
--- a/modules/audio_processing/gain_control_unittest.cc
+++ b/modules/audio_processing/gain_control_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/gain_control_impl.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/include/aec_dump.h b/modules/audio_processing/include/aec_dump.h
index 84bba85..cec1aa3 100644
--- a/modules/audio_processing/include/aec_dump.h
+++ b/modules/audio_processing/include/aec_dump.h
@@ -15,7 +15,7 @@
 #include <string>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc b/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
index e845687..756b303 100644
--- a/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
+++ b/modules/audio_processing/intelligibility/intelligibility_enhancer_unittest.cc
@@ -15,13 +15,13 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.h"
 #include "webrtc/modules/audio_processing/noise_suppression_impl.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/audio_processing/level_controller/biquad_filter.h b/modules/audio_processing/level_controller/biquad_filter.h
index 62bacf2..3a052a2 100644
--- a/modules/audio_processing/level_controller/biquad_filter.h
+++ b/modules/audio_processing/level_controller/biquad_filter.h
@@ -13,7 +13,7 @@
 
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
diff --git a/modules/audio_processing/level_controller/down_sampler.h b/modules/audio_processing/level_controller/down_sampler.h
index 95e3248..5469a09 100644
--- a/modules/audio_processing/level_controller/down_sampler.h
+++ b/modules/audio_processing/level_controller/down_sampler.h
@@ -11,8 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_DOWN_SAMPLER_H_
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/level_controller/biquad_filter.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/level_controller/gain_applier.cc b/modules/audio_processing/level_controller/gain_applier.cc
index 9e2fba0..54bcc5b 100644
--- a/modules/audio_processing/level_controller/gain_applier.cc
+++ b/modules/audio_processing/level_controller/gain_applier.cc
@@ -12,7 +12,7 @@
 
 #include <algorithm>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 
 #include "webrtc/modules/audio_processing/audio_buffer.h"
diff --git a/modules/audio_processing/level_controller/level_controller.cc b/modules/audio_processing/level_controller/level_controller.cc
index bc6b706..028501c 100644
--- a/modules/audio_processing/level_controller/level_controller.cc
+++ b/modules/audio_processing/level_controller/level_controller.cc
@@ -14,6 +14,7 @@
 #include <algorithm>
 #include <numeric>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/level_controller/gain_applier.h"
 #include "webrtc/modules/audio_processing/level_controller/gain_selector.h"
@@ -22,7 +23,6 @@
 #include "webrtc/modules/audio_processing/level_controller/saturating_gain_estimator.h"
 #include "webrtc/modules/audio_processing/level_controller/signal_classifier.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/logging.h"
diff --git a/modules/audio_processing/level_controller/level_controller_complexity_unittest.cc b/modules/audio_processing/level_controller/level_controller_complexity_unittest.cc
index 7acdfc6..62859ee 100644
--- a/modules/audio_processing/level_controller/level_controller_complexity_unittest.cc
+++ b/modules/audio_processing/level_controller/level_controller_complexity_unittest.cc
@@ -11,6 +11,7 @@
 #include <numeric>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/level_controller/level_controller.h"
@@ -18,7 +19,6 @@
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
 #include "webrtc/modules/audio_processing/test/performance_timer.h"
 #include "webrtc/modules/audio_processing/test/simulator_buffers.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/system_wrappers/include/clock.h"
 #include "webrtc/test/gtest.h"
diff --git a/modules/audio_processing/level_controller/level_controller_unittest.cc b/modules/audio_processing/level_controller/level_controller_unittest.cc
index 633bfaf..b7571e9 100644
--- a/modules/audio_processing/level_controller/level_controller_unittest.cc
+++ b/modules/audio_processing/level_controller/level_controller_unittest.cc
@@ -10,12 +10,12 @@
 
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/level_controller/level_controller.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/audio_processing/level_controller/noise_spectrum_estimator.cc b/modules/audio_processing/level_controller/noise_spectrum_estimator.cc
index f1c1f2b..f7b1e19 100644
--- a/modules/audio_processing/level_controller/noise_spectrum_estimator.cc
+++ b/modules/audio_processing/level_controller/noise_spectrum_estimator.cc
@@ -13,8 +13,8 @@
 #include <string.h>
 #include <algorithm>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/level_controller/noise_spectrum_estimator.h b/modules/audio_processing/level_controller/noise_spectrum_estimator.h
index 1102966..196f056 100644
--- a/modules/audio_processing/level_controller/noise_spectrum_estimator.h
+++ b/modules/audio_processing/level_controller/noise_spectrum_estimator.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_NOISE_SPECTRUM_ESTIMATOR_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_NOISE_SPECTRUM_ESTIMATOR_H_
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/level_controller/signal_classifier.cc b/modules/audio_processing/level_controller/signal_classifier.cc
index 98686ac..f557730 100644
--- a/modules/audio_processing/level_controller/signal_classifier.cc
+++ b/modules/audio_processing/level_controller/signal_classifier.cc
@@ -14,11 +14,11 @@
 #include <numeric>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/level_controller/down_sampler.h"
 #include "webrtc/modules/audio_processing/level_controller/noise_spectrum_estimator.h"
 #include "webrtc/modules/audio_processing/logging/apm_data_dumper.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/level_controller/signal_classifier.h b/modules/audio_processing/level_controller/signal_classifier.h
index 5e0749a..1ec1951 100644
--- a/modules/audio_processing/level_controller/signal_classifier.h
+++ b/modules/audio_processing/level_controller/signal_classifier.h
@@ -14,10 +14,10 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/level_controller/down_sampler.h"
 #include "webrtc/modules/audio_processing/level_controller/noise_spectrum_estimator.h"
 #include "webrtc/modules/audio_processing/utility/ooura_fft.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/level_estimator_impl.cc b/modules/audio_processing/level_estimator_impl.cc
index 1e52728..27a6137 100644
--- a/modules/audio_processing/level_estimator_impl.cc
+++ b/modules/audio_processing/level_estimator_impl.cc
@@ -10,9 +10,9 @@
 
 #include "webrtc/modules/audio_processing/level_estimator_impl.h"
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/rms_level.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/level_estimator_unittest.cc b/modules/audio_processing/level_estimator_unittest.cc
index cdb9c4e..a1ba5a2 100644
--- a/modules/audio_processing/level_estimator_unittest.cc
+++ b/modules/audio_processing/level_estimator_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/level_estimator_impl.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/logging/apm_data_dumper.h b/modules/audio_processing/logging/apm_data_dumper.h
index 82dc122..34213a7 100644
--- a/modules/audio_processing/logging/apm_data_dumper.h
+++ b/modules/audio_processing/logging/apm_data_dumper.h
@@ -17,8 +17,8 @@
 #include <string>
 #include <unordered_map>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_audio/wav_file.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 // Check to verify that the define is properly set.
diff --git a/modules/audio_processing/low_cut_filter_unittest.cc b/modules/audio_processing/low_cut_filter_unittest.cc
index 736f0dc..d1081a4 100644
--- a/modules/audio_processing/low_cut_filter_unittest.cc
+++ b/modules/audio_processing/low_cut_filter_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/low_cut_filter.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/noise_suppression_unittest.cc b/modules/audio_processing/noise_suppression_unittest.cc
index 835d396..3595413 100644
--- a/modules/audio_processing/noise_suppression_unittest.cc
+++ b/modules/audio_processing/noise_suppression_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/noise_suppression_impl.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/residual_echo_detector.h b/modules/audio_processing/residual_echo_detector.h
index 8ac25fb..44bc081 100644
--- a/modules/audio_processing/residual_echo_detector.h
+++ b/modules/audio_processing/residual_echo_detector.h
@@ -13,11 +13,11 @@
 
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/echo_detector/circular_buffer.h"
 #include "webrtc/modules/audio_processing/echo_detector/mean_variance_estimator.h"
 #include "webrtc/modules/audio_processing/echo_detector/moving_max.h"
 #include "webrtc/modules/audio_processing/echo_detector/normalized_covariance_estimator.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/audio_processing/residual_echo_detector_complexity_unittest.cc b/modules/audio_processing/residual_echo_detector_complexity_unittest.cc
index a239279..5d854c4 100644
--- a/modules/audio_processing/residual_echo_detector_complexity_unittest.cc
+++ b/modules/audio_processing/residual_echo_detector_complexity_unittest.cc
@@ -11,13 +11,13 @@
 #include <numeric>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/residual_echo_detector.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/performance_timer.h"
 #include "webrtc/modules/audio_processing/test/simulator_buffers.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/system_wrappers/include/clock.h"
 #include "webrtc/test/gtest.h"
diff --git a/modules/audio_processing/rms_level.h b/modules/audio_processing/rms_level.h
index 4701e0c..4ce28a4 100644
--- a/modules/audio_processing/rms_level.h
+++ b/modules/audio_processing/rms_level.h
@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_RMS_LEVEL_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_RMS_LEVEL_H_
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/optional.h"
 #include "webrtc/typedefs.h"
 
diff --git a/modules/audio_processing/rms_level_unittest.cc b/modules/audio_processing/rms_level_unittest.cc
index 89338ea..9d1f205 100644
--- a/modules/audio_processing/rms_level_unittest.cc
+++ b/modules/audio_processing/rms_level_unittest.cc
@@ -11,8 +11,8 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/rms_level.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/mathutils.h"
 #include "webrtc/rtc_base/safe_conversions.h"
diff --git a/modules/audio_processing/test/audio_buffer_tools.h b/modules/audio_processing/test/audio_buffer_tools.h
index f35e9a7..96ccad0 100644
--- a/modules/audio_processing/test/audio_buffer_tools.h
+++ b/modules/audio_processing/test/audio_buffer_tools.h
@@ -12,9 +12,9 @@
 #define WEBRTC_MODULES_AUDIO_PROCESSING_TEST_AUDIO_BUFFER_TOOLS_H_
 
 #include <vector>
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 namespace test {
diff --git a/modules/audio_processing/test/bitexactness_tools.cc b/modules/audio_processing/test/bitexactness_tools.cc
index ae3d216..c5e4d38 100644
--- a/modules/audio_processing/test/bitexactness_tools.cc
+++ b/modules/audio_processing/test/bitexactness_tools.cc
@@ -15,7 +15,7 @@
 #include <string>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/test/testsupport/fileutils.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/test/bitexactness_tools.h b/modules/audio_processing/test/bitexactness_tools.h
index e4b863a..3a1722a 100644
--- a/modules/audio_processing/test/bitexactness_tools.h
+++ b/modules/audio_processing/test/bitexactness_tools.h
@@ -14,8 +14,8 @@
 
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_coding/neteq/tools/input_audio_file.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/test/conversational_speech/BUILD.gn b/modules/audio_processing/test/conversational_speech/BUILD.gn
index 5c681a0..1f24c09 100644
--- a/modules/audio_processing/test/conversational_speech/BUILD.gn
+++ b/modules/audio_processing/test/conversational_speech/BUILD.gn
@@ -45,6 +45,7 @@
   ]
   deps = [
     "../../../..:webrtc_common",
+    "../../../../api:array_view",
     "../../../../common_audio",
     "../../../../rtc_base:rtc_base_approved",
   ]
@@ -63,6 +64,7 @@
   deps = [
     ":lib",
     "../../../..:webrtc_common",
+    "../../../../api:array_view",
     "../../../../common_audio",
     "../../../../rtc_base:rtc_base_approved",
     "../../../../test:test_support",
diff --git a/modules/audio_processing/test/conversational_speech/mock_wavreader.h b/modules/audio_processing/test/conversational_speech/mock_wavreader.h
index a49ba2c..8e86f4d 100644
--- a/modules/audio_processing/test/conversational_speech/mock_wavreader.h
+++ b/modules/audio_processing/test/conversational_speech/mock_wavreader.h
@@ -14,8 +14,8 @@
 #include <cstddef>
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/wavreader_interface.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gmock.h"
 #include "webrtc/typedefs.h"
 
diff --git a/modules/audio_processing/test/conversational_speech/multiend_call.h b/modules/audio_processing/test/conversational_speech/multiend_call.h
index b28dc9b..38cc0e2 100644
--- a/modules/audio_processing/test/conversational_speech/multiend_call.h
+++ b/modules/audio_processing/test/conversational_speech/multiend_call.h
@@ -19,10 +19,10 @@
 #include <utility>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/timing.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/wavreader_abstract_factory.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/wavreader_interface.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/test/conversational_speech/simulator.cc b/modules/audio_processing/test/conversational_speech/simulator.cc
index cb4bcfa..709dec3 100644
--- a/modules/audio_processing/test/conversational_speech/simulator.cc
+++ b/modules/audio_processing/test/conversational_speech/simulator.cc
@@ -14,9 +14,9 @@
 #include <utility>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_audio/wav_file.h"
 #include "webrtc/modules/audio_processing/test/conversational_speech/wavreader_interface.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/logging.h"
 #include "webrtc/rtc_base/pathutils.h"
diff --git a/modules/audio_processing/test/conversational_speech/timing.h b/modules/audio_processing/test/conversational_speech/timing.h
index 43a533c..62ed1cb 100644
--- a/modules/audio_processing/test/conversational_speech/timing.h
+++ b/modules/audio_processing/test/conversational_speech/timing.h
@@ -14,7 +14,7 @@
 #include <string>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 
 namespace webrtc {
 namespace test {
diff --git a/modules/audio_processing/test/conversational_speech/wavreader_factory.cc b/modules/audio_processing/test/conversational_speech/wavreader_factory.cc
index 85ab76d..c2f87a8 100644
--- a/modules/audio_processing/test/conversational_speech/wavreader_factory.cc
+++ b/modules/audio_processing/test/conversational_speech/wavreader_factory.cc
@@ -12,8 +12,8 @@
 
 #include <cstddef>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_audio/wav_file.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/typedefs.h"
 
diff --git a/modules/audio_processing/test/conversational_speech/wavreader_interface.h b/modules/audio_processing/test/conversational_speech/wavreader_interface.h
index 1d1459f..74dae40 100644
--- a/modules/audio_processing/test/conversational_speech/wavreader_interface.h
+++ b/modules/audio_processing/test/conversational_speech/wavreader_interface.h
@@ -13,7 +13,7 @@
 
 #include <stddef.h>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
diff --git a/modules/audio_processing/test/echo_canceller_test_tools.h b/modules/audio_processing/test/echo_canceller_test_tools.h
index 27f75ac..1acfeac 100644
--- a/modules/audio_processing/test/echo_canceller_test_tools.h
+++ b/modules/audio_processing/test/echo_canceller_test_tools.h
@@ -14,7 +14,7 @@
 #include <algorithm>
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/random.h"
 
diff --git a/modules/audio_processing/test/echo_canceller_test_tools_unittest.cc b/modules/audio_processing/test/echo_canceller_test_tools_unittest.cc
index aaef88d..0f28327 100644
--- a/modules/audio_processing/test/echo_canceller_test_tools_unittest.cc
+++ b/modules/audio_processing/test/echo_canceller_test_tools_unittest.cc
@@ -12,7 +12,7 @@
 
 #include <vector>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/test/gtest.h"
diff --git a/modules/audio_processing/voice_detection_unittest.cc b/modules/audio_processing/voice_detection_unittest.cc
index 32a4da5..c4ccd82 100644
--- a/modules/audio_processing/voice_detection_unittest.cc
+++ b/modules/audio_processing/voice_detection_unittest.cc
@@ -9,11 +9,11 @@
  */
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
 #include "webrtc/modules/audio_processing/voice_detection_impl.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
diff --git a/modules/rtp_rtcp/BUILD.gn b/modules/rtp_rtcp/BUILD.gn
index 07ac7ae..8d17d1a 100644
--- a/modules/rtp_rtcp/BUILD.gn
+++ b/modules/rtp_rtcp/BUILD.gn
@@ -167,6 +167,7 @@
   deps = [
     "..:module_api",
     "../..:webrtc_common",
+    "../../api:array_view",
     "../../api:libjingle_peerconnection_api",
     "../../api:transport_api",
     "../../api/audio_codecs:audio_codecs_api",
@@ -341,6 +342,7 @@
       ":rtp_rtcp",
       "..:module_api",
       "../..:webrtc_common",
+      "../../api:array_view",
       "../../api:libjingle_peerconnection_api",
       "../../api:transport_api",
       "../../common_video:common_video",
diff --git a/modules/rtp_rtcp/include/flexfec_sender.h b/modules/rtp_rtcp/include/flexfec_sender.h
index 82a01cc..9404f78 100644
--- a/modules/rtp_rtcp/include/flexfec_sender.h
+++ b/modules/rtp_rtcp/include/flexfec_sender.h
@@ -14,6 +14,7 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/rtpparameters.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/rtp_rtcp/include/flexfec_sender.h"
@@ -21,7 +22,6 @@
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h"
 #include "webrtc/modules/rtp_rtcp/source/ulpfec_generator.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/basictypes.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/system_wrappers/include/clock.h"
diff --git a/modules/rtp_rtcp/include/rtp_header_extension_map.h b/modules/rtp_rtcp/include/rtp_header_extension_map.h
index 93cbd10..dcb48b6 100644
--- a/modules/rtp_rtcp/include/rtp_header_extension_map.h
+++ b/modules/rtp_rtcp/include/rtp_header_extension_map.h
@@ -13,9 +13,9 @@
 
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/rtpparameters.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/basictypes.h"
 #include "webrtc/rtc_base/checks.h"
 
diff --git a/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc b/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
index d42a74e..50585e2 100644
--- a/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
+++ b/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
@@ -10,6 +10,7 @@
 
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_types.h"
 #include "webrtc/common_video/include/video_bitrate_allocator.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
@@ -31,7 +32,6 @@
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_receiver.h"
 #include "webrtc/modules/rtp_rtcp/source/time_util.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/arraysize.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/system_wrappers/include/ntp_time.h"
diff --git a/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc b/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc
index ec486c0..047b4a3 100644
--- a/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc
+++ b/modules/rtp_rtcp/source/rtp_format_h264_unittest.cc
@@ -11,13 +11,13 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/common_video/h264/h264_common.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/rtp_rtcp/mocks/mock_rtp_rtcp.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_format.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gmock.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/rtp_rtcp/source/rtp_format_video_generic_unittest.cc b/modules/rtp_rtcp/source/rtp_format_video_generic_unittest.cc
index 91ad001..78ee435 100644
--- a/modules/rtp_rtcp/source/rtp_format_video_generic_unittest.cc
+++ b/modules/rtp_rtcp/source/rtp_format_video_generic_unittest.cc
@@ -13,12 +13,12 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/rtp_rtcp/mocks/mock_rtp_rtcp.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_format_video_generic.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gmock.h"
 #include "webrtc/test/gtest.h"
 
diff --git a/modules/rtp_rtcp/source/rtp_header_extensions.h b/modules/rtp_rtcp/source/rtp_header_extensions.h
index dc63140..866dc28 100644
--- a/modules/rtp_rtcp/source/rtp_header_extensions.h
+++ b/modules/rtp_rtcp/source/rtp_header_extensions.h
@@ -13,11 +13,11 @@
 #include <stdint.h>
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/video/video_content_type.h"
 #include "webrtc/api/video/video_rotation.h"
 #include "webrtc/api/video/video_timing.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 
diff --git a/modules/rtp_rtcp/source/rtp_packet.h b/modules/rtp_rtcp/source/rtp_packet.h
index 47aaf57..8797417 100644
--- a/modules/rtp_rtcp/source/rtp_packet.h
+++ b/modules/rtp_rtcp/source/rtp_packet.h
@@ -12,8 +12,8 @@
 
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/basictypes.h"
 #include "webrtc/rtc_base/copyonwritebuffer.h"
 
diff --git a/modules/rtp_rtcp/source/rtp_sender.h b/modules/rtp_rtcp/source/rtp_sender.h
index 9ab3e33..069357f 100644
--- a/modules/rtp_rtcp/source/rtp_sender.h
+++ b/modules/rtp_rtcp/source/rtp_sender.h
@@ -16,6 +16,7 @@
 #include <utility>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/call/transport.h"
 #include "webrtc/common_types.h"
 #include "webrtc/modules/rtp_rtcp/include/flexfec_sender.h"
@@ -25,7 +26,6 @@
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_history.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_rtcp_config.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_utility.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/deprecation.h"
diff --git a/pc/BUILD.gn b/pc/BUILD.gn
index 71e29d8..6473cf6 100644
--- a/pc/BUILD.gn
+++ b/pc/BUILD.gn
@@ -284,6 +284,7 @@
     deps = [
       ":libjingle_peerconnection",
       ":rtc_pc",
+      "../api:array_view",
       "../logging:rtc_event_log_api",
       "../media:rtc_media_base",
       "../media:rtc_media_tests_utils",
diff --git a/pc/channel_unittest.cc b/pc/channel_unittest.cc
index ae34a12..5279683 100644
--- a/pc/channel_unittest.cc
+++ b/pc/channel_unittest.cc
@@ -10,6 +10,7 @@
 
 #include <memory>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/media/base/fakemediaengine.h"
 #include "webrtc/media/base/fakertp.h"
 #include "webrtc/media/base/mediachannel.h"
@@ -18,7 +19,6 @@
 #include "webrtc/p2p/base/fakedtlstransport.h"
 #include "webrtc/p2p/base/fakepackettransport.h"
 #include "webrtc/pc/channel.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/fakeclock.h"
diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index 03e8ea6..1914b27 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -835,7 +835,6 @@
       #visibility = [ "..:rtc_unittests" ]
     }
     sources = [
-      "array_view_unittest.cc",
       "atomicops_unittest.cc",
       "base64_unittest.cc",
       "basictypes_unittest.cc",
@@ -883,6 +882,7 @@
       ":rtc_base_tests_main",
       ":rtc_base_tests_utils",
       ":rtc_task_queue",
+      "../api:array_view",
       "../system_wrappers:system_wrappers",
       "../test:test_support",
     ]
diff --git a/rtc_base/array_view.h b/rtc_base/array_view.h
index afc6999..23c7b5b 100644
--- a/rtc_base/array_view.h
+++ b/rtc_base/array_view.h
@@ -8,246 +8,12 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+// This header is for backwards compatibility only, and will be removed soon.
+// Include webrtc/api/array_view.h instead.
+
 #ifndef WEBRTC_RTC_BASE_ARRAY_VIEW_H_
 #define WEBRTC_RTC_BASE_ARRAY_VIEW_H_
 
-#include "webrtc/rtc_base/checks.h"
-#include "webrtc/rtc_base/type_traits.h"
-
-namespace rtc {
-
-// Many functions read from or write to arrays. The obvious way to do this is
-// to use two arguments, a pointer to the first element and an element count:
-//
-//   bool Contains17(const int* arr, size_t size) {
-//     for (size_t i = 0; i < size; ++i) {
-//       if (arr[i] == 17)
-//         return true;
-//     }
-//     return false;
-//   }
-//
-// This is flexible, since it doesn't matter how the array is stored (C array,
-// std::vector, rtc::Buffer, ...), but it's error-prone because the caller has
-// to correctly specify the array length:
-//
-//   Contains17(arr, arraysize(arr));     // C array
-//   Contains17(arr.data(), arr.size());  // std::vector
-//   Contains17(arr, size);               // pointer + size
-//   ...
-//
-// It's also kind of messy to have two separate arguments for what is
-// conceptually a single thing.
-//
-// Enter rtc::ArrayView<T>. It contains a T pointer (to an array it doesn't
-// own) and a count, and supports the basic things you'd expect, such as
-// indexing and iteration. It allows us to write our function like this:
-//
-//   bool Contains17(rtc::ArrayView<const int> arr) {
-//     for (auto e : arr) {
-//       if (e == 17)
-//         return true;
-//     }
-//     return false;
-//   }
-//
-// And even better, because a bunch of things will implicitly convert to
-// ArrayView, we can call it like this:
-//
-//   Contains17(arr);                             // C array
-//   Contains17(arr);                             // std::vector
-//   Contains17(rtc::ArrayView<int>(arr, size));  // pointer + size
-//   Contains17(nullptr);                         // nullptr -> empty ArrayView
-//   ...
-//
-// ArrayView<T> stores both a pointer and a size, but you may also use
-// ArrayView<T, N>, which has a size that's fixed at compile time (which means
-// it only has to store the pointer).
-//
-// One important point is that ArrayView<T> and ArrayView<const T> are
-// different types, which allow and don't allow mutation of the array elements,
-// respectively. The implicit conversions work just like you'd hope, so that
-// e.g. vector<int> will convert to either ArrayView<int> or ArrayView<const
-// int>, but const vector<int> will convert only to ArrayView<const int>.
-// (ArrayView itself can be the source type in such conversions, so
-// ArrayView<int> will convert to ArrayView<const int>.)
-//
-// Note: ArrayView is tiny (just a pointer and a count if variable-sized, just
-// a pointer if fix-sized) and trivially copyable, so it's probably cheaper to
-// pass it by value than by const reference.
-
-namespace impl {
-
-// Magic constant for indicating that the size of an ArrayView is variable
-// instead of fixed.
-enum : std::ptrdiff_t { kArrayViewVarSize = -4711 };
-
-// Base class for ArrayViews of fixed nonzero size.
-template <typename T, std::ptrdiff_t Size>
-class ArrayViewBase {
-  static_assert(Size > 0, "ArrayView size must be variable or non-negative");
-
- public:
-  ArrayViewBase(T* data, size_t size) : data_(data) {}
-
-  static constexpr size_t size() { return Size; }
-  static constexpr bool empty() { return false; }
-  T* data() const { return data_; }
-
- protected:
-  static constexpr bool fixed_size() { return true; }
-
- private:
-  T* data_;
-};
-
-// Specialized base class for ArrayViews of fixed zero size.
-template <typename T>
-class ArrayViewBase<T, 0> {
- public:
-  explicit ArrayViewBase(T* data, size_t size) {}
-
-  static constexpr size_t size() { return 0; }
-  static constexpr bool empty() { return true; }
-  T* data() const { return nullptr; }
-
- protected:
-  static constexpr bool fixed_size() { return true; }
-};
-
-// Specialized base class for ArrayViews of variable size.
-template <typename T>
-class ArrayViewBase<T, impl::kArrayViewVarSize> {
- public:
-  ArrayViewBase(T* data, size_t size)
-      : data_(size == 0 ? nullptr : data), size_(size) {}
-
-  size_t size() const { return size_; }
-  bool empty() const { return size_ == 0; }
-  T* data() const { return data_; }
-
- protected:
-  static constexpr bool fixed_size() { return false; }
-
- private:
-  T* data_;
-  size_t size_;
-};
-
-}  // namespace impl
-
-template <typename T, std::ptrdiff_t Size = impl::kArrayViewVarSize>
-class ArrayView final : public impl::ArrayViewBase<T, Size> {
- public:
-  using value_type = T;
-  using const_iterator = const T*;
-
-  // Construct an ArrayView from a pointer and a length.
-  template <typename U>
-  ArrayView(U* data, size_t size)
-      : impl::ArrayViewBase<T, Size>::ArrayViewBase(data, size) {
-    RTC_DCHECK_EQ(size == 0 ? nullptr : data, this->data());
-    RTC_DCHECK_EQ(size, this->size());
-    RTC_DCHECK_EQ(!this->data(),
-                  this->size() == 0);  // data is null iff size == 0.
-  }
-
-  // Construct an empty ArrayView. Note that fixed-size ArrayViews of size > 0
-  // cannot be empty.
-  ArrayView() : ArrayView(nullptr, 0) {}
-  ArrayView(std::nullptr_t) : ArrayView() {}
-  ArrayView(std::nullptr_t, size_t size)
-      : ArrayView(static_cast<T*>(nullptr), size) {
-    static_assert(Size == 0 || Size == impl::kArrayViewVarSize, "");
-    RTC_DCHECK_EQ(0, size);
-  }
-
-  // Construct an ArrayView from an array.
-  template <typename U, size_t N>
-  ArrayView(U (&array)[N]) : ArrayView(array, N) {
-    static_assert(Size == N || Size == impl::kArrayViewVarSize,
-                  "Array size must match ArrayView size");
-  }
-
-  // (Only if size is fixed.) Construct an ArrayView from any type U that has a
-  // static constexpr size() method whose return value is equal to Size, and a
-  // data() method whose return value converts implicitly to T*. In particular,
-  // this means we allow conversion from ArrayView<T, N> to ArrayView<const T,
-  // N>, but not the other way around. We also don't allow conversion from
-  // ArrayView<T> to ArrayView<T, N>, or from ArrayView<T, M> to ArrayView<T,
-  // N> when M != N.
-  template <typename U,
-            typename std::enable_if<
-                Size != impl::kArrayViewVarSize &&
-                HasDataAndSize<U, T>::value>::type* = nullptr>
-  ArrayView(U& u) : ArrayView(u.data(), u.size()) {
-    static_assert(U::size() == Size, "Sizes must match exactly");
-  }
-
-  // (Only if size is variable.) Construct an ArrayView from any type U that
-  // has a size() method whose return value converts implicitly to size_t, and
-  // a data() method whose return value converts implicitly to T*. In
-  // particular, this means we allow conversion from ArrayView<T> to
-  // ArrayView<const T>, but not the other way around. Other allowed
-  // conversions include
-  // ArrayView<T, N> to ArrayView<T> or ArrayView<const T>,
-  // std::vector<T> to ArrayView<T> or ArrayView<const T>,
-  // const std::vector<T> to ArrayView<const T>,
-  // rtc::Buffer to ArrayView<uint8_t> or ArrayView<const uint8_t>, and
-  // const rtc::Buffer to ArrayView<const uint8_t>.
-  template <
-      typename U,
-      typename std::enable_if<Size == impl::kArrayViewVarSize &&
-                              HasDataAndSize<U, T>::value>::type* = nullptr>
-  ArrayView(U& u) : ArrayView(u.data(), u.size()) {}
-
-  // Indexing and iteration. These allow mutation even if the ArrayView is
-  // const, because the ArrayView doesn't own the array. (To prevent mutation,
-  // use a const element type.)
-  T& operator[](size_t idx) const {
-    RTC_DCHECK_LT(idx, this->size());
-    RTC_DCHECK(this->data());
-    return this->data()[idx];
-  }
-  T* begin() const { return this->data(); }
-  T* end() const { return this->data() + this->size(); }
-  const T* cbegin() const { return this->data(); }
-  const T* cend() const { return this->data() + this->size(); }
-
-  ArrayView<T> subview(size_t offset, size_t size) const {
-    return offset < this->size()
-               ? ArrayView<T>(this->data() + offset,
-                              std::min(size, this->size() - offset))
-               : ArrayView<T>();
-  }
-  ArrayView<T> subview(size_t offset) const {
-    return subview(offset, this->size());
-  }
-};
-
-// Comparing two ArrayViews compares their (pointer,size) pairs; it does *not*
-// dereference the pointers.
-template <typename T, std::ptrdiff_t Size1, std::ptrdiff_t Size2>
-bool operator==(const ArrayView<T, Size1>& a, const ArrayView<T, Size2>& b) {
-  return a.data() == b.data() && a.size() == b.size();
-}
-template <typename T, std::ptrdiff_t Size1, std::ptrdiff_t Size2>
-bool operator!=(const ArrayView<T, Size1>& a, const ArrayView<T, Size2>& b) {
-  return !(a == b);
-}
-
-// Variable-size ArrayViews are the size of two pointers; fixed-size ArrayViews
-// are the size of one pointer. (And as a special case, fixed-size ArrayViews
-// of size 0 require no storage.)
-static_assert(sizeof(ArrayView<int>) == 2 * sizeof(int*), "");
-static_assert(sizeof(ArrayView<int, 17>) == sizeof(int*), "");
-static_assert(std::is_empty<ArrayView<int, 0>>::value, "");
-
-template <typename T>
-inline ArrayView<T> MakeArrayView(T* data, size_t size) {
-  return ArrayView<T>(data, size);
-}
-
-}  // namespace rtc
+#include "webrtc/api/array_view.h"
 
 #endif  // WEBRTC_RTC_BASE_ARRAY_VIEW_H_
diff --git a/rtc_base/buffer.h b/rtc_base/buffer.h
index 25d55e0..b8fe98c 100644
--- a/rtc_base/buffer.h
+++ b/rtc_base/buffer.h
@@ -17,7 +17,7 @@
 #include <type_traits>
 #include <utility>
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/type_traits.h"
 
diff --git a/rtc_base/buffer_unittest.cc b/rtc_base/buffer_unittest.cc
index bd4306e..7bf1b5b 100644
--- a/rtc_base/buffer_unittest.cc
+++ b/rtc_base/buffer_unittest.cc
@@ -10,7 +10,7 @@
 
 #include "webrtc/rtc_base/buffer.h"
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/gunit.h"
 
 #include <type_traits>
diff --git a/rtc_base/optional.h b/rtc_base/optional.h
index 6871f3d..ca3208e 100644
--- a/rtc_base/optional.h
+++ b/rtc_base/optional.h
@@ -20,7 +20,7 @@
 #include <ostream>
 #endif  // UNIT_TEST
 
-#include "webrtc/rtc_base/array_view.h"
+#include "webrtc/api/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/sanitizer.h"
 
diff --git a/test/BUILD.gn b/test/BUILD.gn
index 2a49019..4faff71 100644
--- a/test/BUILD.gn
+++ b/test/BUILD.gn
@@ -89,6 +89,7 @@
 
   deps = [
     "..:webrtc_common",
+    "../api:array_view",
     "../modules/rtp_rtcp",
     "../rtc_base:rtc_base_approved",
     "//testing/gtest",
@@ -488,6 +489,7 @@
   }
   deps = [
     "..:webrtc_common",
+    "../api:array_view",
     "../common_audio:common_audio",
     "../modules/audio_device:audio_device",
     "../rtc_base:rtc_base_approved",
@@ -695,6 +697,7 @@
 
   deps = [
     ":test_support",
+    "../api:array_view",
     "../api/audio_codecs:audio_codecs_api",
     "../api/audio_codecs:builtin_audio_decoder_factory",
     "../rtc_base:rtc_base_approved",
diff --git a/test/fake_audio_device.h b/test/fake_audio_device.h
index 8b15cd7..db56c74 100644
--- a/test/fake_audio_device.h
+++ b/test/fake_audio_device.h
@@ -14,8 +14,8 @@
 #include <string>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_device/include/fake_audio_device.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/buffer.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/event.h"
diff --git a/test/fuzzers/BUILD.gn b/test/fuzzers/BUILD.gn
index 9453ce4..e9d771c 100644
--- a/test/fuzzers/BUILD.gn
+++ b/test/fuzzers/BUILD.gn
@@ -287,6 +287,7 @@
     "neteq_rtp_fuzzer.cc",
   ]
   deps = [
+    "../../api:array_view",
     "../../modules/audio_coding:neteq",
     "../../modules/audio_coding:neteq_test_tools",
     "../../modules/audio_coding:neteq_tools_minimal",
@@ -354,6 +355,7 @@
     "transport_feedback_packet_loss_tracker_fuzzer.cc",
   ]
   deps = [
+    "../../api:array_view",
     "../../modules/rtp_rtcp",
     "../../rtc_base:rtc_base_approved",
     "../../voice_engine",
diff --git a/test/fuzzers/neteq_rtp_fuzzer.cc b/test/fuzzers/neteq_rtp_fuzzer.cc
index 1a2bfc4..5eba72c 100644
--- a/test/fuzzers/neteq_rtp_fuzzer.cc
+++ b/test/fuzzers/neteq_rtp_fuzzer.cc
@@ -12,12 +12,12 @@
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h"
 #include "webrtc/modules/audio_coding/neteq/tools/audio_checksum.h"
 #include "webrtc/modules/audio_coding/neteq/tools/encode_neteq_input.h"
 #include "webrtc/modules/audio_coding/neteq/tools/neteq_test.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
-#include "webrtc/rtc_base/array_view.h"
 
 namespace webrtc {
 namespace test {
diff --git a/test/fuzzers/transport_feedback_packet_loss_tracker_fuzzer.cc b/test/fuzzers/transport_feedback_packet_loss_tracker_fuzzer.cc
index 2e532d1..bfd03fa 100644
--- a/test/fuzzers/transport_feedback_packet_loss_tracker_fuzzer.cc
+++ b/test/fuzzers/transport_feedback_packet_loss_tracker_fuzzer.cc
@@ -10,10 +10,10 @@
 
 #include <algorithm>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "webrtc/modules/rtp_rtcp/source/byte_io.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/voice_engine/transport_feedback_packet_loss_tracker.h"
 
 namespace webrtc {
diff --git a/test/mock_audio_encoder.h b/test/mock_audio_encoder.h
index 90e2b9d..c30b35e 100644
--- a/test/mock_audio_encoder.h
+++ b/test/mock_audio_encoder.h
@@ -13,8 +13,8 @@
 
 #include <string>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/api/audio_codecs/audio_encoder.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/test/gmock.h"
 
 namespace webrtc {
diff --git a/test/rtcp_packet_parser.h b/test/rtcp_packet_parser.h
index 4bc5477..997c343 100644
--- a/test/rtcp_packet_parser.h
+++ b/test/rtcp_packet_parser.h
@@ -12,6 +12,7 @@
 #ifndef WEBRTC_TEST_RTCP_PACKET_PARSER_H_
 #define WEBRTC_TEST_RTCP_PACKET_PARSER_H_
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/app.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/bye.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/common_header.h"
@@ -28,7 +29,6 @@
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbr.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 
 namespace webrtc {
diff --git a/voice_engine/BUILD.gn b/voice_engine/BUILD.gn
index 984d149..9862579 100644
--- a/voice_engine/BUILD.gn
+++ b/voice_engine/BUILD.gn
@@ -135,6 +135,7 @@
     ":file_player",
     ":file_recorder",
     "..:webrtc_common",
+    "../api:array_view",
     "../api:audio_mixer_api",
     "../api:call_api",
     "../api:libjingle_peerconnection_api",
diff --git a/voice_engine/channel.cc b/voice_engine/channel.cc
index 039d935..1a56e81 100644
--- a/voice_engine/channel.cc
+++ b/voice_engine/channel.cc
@@ -13,6 +13,7 @@
 #include <algorithm>
 #include <utility>
 
+#include "webrtc/api/array_view.h"
 #include "webrtc/audio/utility/audio_frame_operations.h"
 #include "webrtc/call/rtp_transport_controller_send_interface.h"
 #include "webrtc/logging/rtc_event_log/rtc_event_log.h"
@@ -27,7 +28,6 @@
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_receiver_strategy.h"
 #include "webrtc/modules/utility/include/process_thread.h"
-#include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/checks.h"
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/format_macros.h"