diff --git a/modules/desktop_capture/BUILD.gn b/modules/desktop_capture/BUILD.gn
index c931436..eb26f5c 100644
--- a/modules/desktop_capture/BUILD.gn
+++ b/modules/desktop_capture/BUILD.gn
@@ -480,6 +480,7 @@
     "../../api:scoped_refptr",
     "../../rtc_base",  # TODO(kjellander): Cleanup in bugs.webrtc.org/3806.
     "../../rtc_base:checks",
+    "../../rtc_base/synchronization:mutex",
     "../../rtc_base/synchronization:rw_lock_wrapper",
     "../../rtc_base/system:arch",
     "../../rtc_base/system:rtc_export",
diff --git a/modules/desktop_capture/mac/desktop_configuration_monitor.cc b/modules/desktop_capture/mac/desktop_configuration_monitor.cc
index e2225cd..048a679 100644
--- a/modules/desktop_capture/mac/desktop_configuration_monitor.cc
+++ b/modules/desktop_capture/mac/desktop_configuration_monitor.cc
@@ -21,7 +21,7 @@
       DesktopConfigurationMonitor::DisplaysReconfiguredCallback, this);
   if (err != kCGErrorSuccess)
     RTC_LOG(LS_ERROR) << "CGDisplayRegisterReconfigurationCallback " << err;
-  rtc::CritScope cs(&desktop_configuration_lock_);
+  MutexLock lock(&desktop_configuration_lock_);
   desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
       MacDesktopConfiguration::TopLeftOrigin);
 }
@@ -34,7 +34,7 @@
 }
 
 MacDesktopConfiguration DesktopConfigurationMonitor::desktop_configuration() {
-  rtc::CritScope crit(&desktop_configuration_lock_);
+  MutexLock lock(&desktop_configuration_lock_);
   return desktop_configuration_;
 }
 
@@ -64,7 +64,7 @@
 
   reconfiguring_displays_.erase(display);
   if (reconfiguring_displays_.empty()) {
-    rtc::CritScope cs(&desktop_configuration_lock_);
+    MutexLock lock(&desktop_configuration_lock_);
     desktop_configuration_ = MacDesktopConfiguration::GetCurrent(
         MacDesktopConfiguration::TopLeftOrigin);
   }
diff --git a/modules/desktop_capture/mac/desktop_configuration_monitor.h b/modules/desktop_capture/mac/desktop_configuration_monitor.h
index 1ed4c6b..46a66d1 100644
--- a/modules/desktop_capture/mac/desktop_configuration_monitor.h
+++ b/modules/desktop_capture/mac/desktop_configuration_monitor.h
@@ -19,7 +19,7 @@
 #include "api/ref_counted_base.h"
 #include "modules/desktop_capture/mac/desktop_configuration.h"
 #include "rtc_base/constructor_magic.h"
-#include "rtc_base/critical_section.h"
+#include "rtc_base/synchronization/mutex.h"
 
 namespace webrtc {
 
@@ -41,7 +41,7 @@
   void DisplaysReconfigured(CGDirectDisplayID display,
                             CGDisplayChangeSummaryFlags flags);
 
-  rtc::CriticalSection desktop_configuration_lock_;
+  Mutex desktop_configuration_lock_;
   MacDesktopConfiguration desktop_configuration_
       RTC_GUARDED_BY(&desktop_configuration_lock_);
   std::set<CGDirectDisplayID> reconfiguring_displays_;
diff --git a/modules/video_capture/BUILD.gn b/modules/video_capture/BUILD.gn
index f734726..b4e8372 100644
--- a/modules/video_capture/BUILD.gn
+++ b/modules/video_capture/BUILD.gn
@@ -36,6 +36,7 @@
     "../../media:rtc_media_base",
     "../../rtc_base:rtc_base_approved",
     "../../rtc_base:stringutils",
+    "../../rtc_base/synchronization:mutex",
     "../../rtc_base/synchronization:rw_lock_wrapper",
     "../../system_wrappers",
     "//third_party/libyuv",
@@ -51,6 +52,7 @@
       "../../api:scoped_refptr",
       "../../rtc_base:checks",
       "../../rtc_base:rtc_base_approved",
+      "../../rtc_base/synchronization:mutex",
       "../../system_wrappers",
     ]
 
@@ -129,6 +131,7 @@
         "../../api/video:video_rtp_headers",
         "../../common_video",
         "../../rtc_base:rtc_base_approved",
+        "../../rtc_base/synchronization:mutex",
         "../../system_wrappers",
         "../../test:frame_utils",
         "../../test:test_main",
diff --git a/modules/video_capture/linux/video_capture_linux.cc b/modules/video_capture/linux/video_capture_linux.cc
index 3086523..504565f 100644
--- a/modules/video_capture/linux/video_capture_linux.cc
+++ b/modules/video_capture/linux/video_capture_linux.cc
@@ -115,7 +115,7 @@
     }
   }
 
-  rtc::CritScope cs(&_captureCritSect);
+  MutexLock lock(&capture_lock_);
   // first open /dev/video device
   char device[20];
   sprintf(device, "/dev/video%d", (int)_deviceId);
@@ -264,7 +264,7 @@
 int32_t VideoCaptureModuleV4L2::StopCapture() {
   if (_captureThread) {
     {
-      rtc::CritScope cs(&_captureCritSect);
+      MutexLock lock(&capture_lock_);
       quit_ = true;
     }
     // Make sure the capture thread stop stop using the critsect.
@@ -272,7 +272,7 @@
     _captureThread.reset();
   }
 
-  rtc::CritScope cs(&_captureCritSect);
+  MutexLock lock(&capture_lock_);
   if (_captureStarted) {
     _captureStarted = false;
 
@@ -387,7 +387,7 @@
   }
 
   {
-    rtc::CritScope cs(&_captureCritSect);
+    MutexLock lock(&capture_lock_);
 
     if (quit_) {
       return false;
diff --git a/modules/video_capture/linux/video_capture_linux.h b/modules/video_capture/linux/video_capture_linux.h
index ac9409e..ddb5d5b 100644
--- a/modules/video_capture/linux/video_capture_linux.h
+++ b/modules/video_capture/linux/video_capture_linux.h
@@ -18,8 +18,8 @@
 
 #include "modules/video_capture/video_capture_defines.h"
 #include "modules/video_capture/video_capture_impl.h"
-#include "rtc_base/critical_section.h"
 #include "rtc_base/platform_thread.h"
+#include "rtc_base/synchronization/mutex.h"
 
 namespace webrtc {
 namespace videocapturemodule {
@@ -43,8 +43,8 @@
 
   // TODO(pbos): Stop using unique_ptr and resetting the thread.
   std::unique_ptr<rtc::PlatformThread> _captureThread;
-  rtc::CriticalSection _captureCritSect;
-  bool quit_ RTC_GUARDED_BY(_captureCritSect);
+  Mutex capture_lock_;
+  bool quit_ RTC_GUARDED_BY(capture_lock_);
   int32_t _deviceId;
   int32_t _deviceFd;
 
diff --git a/modules/video_capture/test/video_capture_unittest.cc b/modules/video_capture/test/video_capture_unittest.cc
index be443e0..1a0cf2d 100644
--- a/modules/video_capture/test/video_capture_unittest.cc
+++ b/modules/video_capture/test/video_capture_unittest.cc
@@ -23,7 +23,7 @@
 #include "common_video/libyuv/include/webrtc_libyuv.h"
 #include "modules/utility/include/process_thread.h"
 #include "modules/video_capture/video_capture_factory.h"
-#include "rtc_base/critical_section.h"
+#include "rtc_base/synchronization/mutex.h"
 #include "rtc_base/time_utils.h"
 #include "system_wrappers/include/sleep.h"
 #include "test/frame_utils.h"
@@ -74,7 +74,7 @@
   }
 
   void OnFrame(const webrtc::VideoFrame& videoFrame) override {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     int height = videoFrame.height();
     int width = videoFrame.width();
 #if defined(WEBRTC_ANDROID) && WEBRTC_ANDROID
@@ -106,38 +106,38 @@
   }
 
   void SetExpectedCapability(VideoCaptureCapability capability) {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     capability_ = capability;
     incoming_frames_ = 0;
     last_render_time_ms_ = 0;
   }
   int incoming_frames() {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     return incoming_frames_;
   }
 
   int timing_warnings() {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     return timing_warnings_;
   }
   VideoCaptureCapability capability() {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     return capability_;
   }
 
   bool CompareLastFrame(const webrtc::VideoFrame& frame) {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     return webrtc::test::FrameBufsEqual(last_frame_,
                                         frame.video_frame_buffer());
   }
 
   void SetExpectedCaptureRotation(webrtc::VideoRotation rotation) {
-    rtc::CritScope cs(&capture_cs_);
+    webrtc::MutexLock lock(&capture_lock_);
     rotate_frame_ = rotation;
   }
 
  private:
-  rtc::CriticalSection capture_cs_;
+  webrtc::Mutex capture_lock_;
   VideoCaptureCapability capability_;
   int64_t last_render_time_ms_;
   int incoming_frames_;
diff --git a/modules/video_capture/video_capture_impl.cc b/modules/video_capture/video_capture_impl.cc
index 9d53a91..6619d15 100644
--- a/modules/video_capture/video_capture_impl.cc
+++ b/modules/video_capture/video_capture_impl.cc
@@ -96,12 +96,12 @@
 
 void VideoCaptureImpl::RegisterCaptureDataCallback(
     rtc::VideoSinkInterface<VideoFrame>* dataCallBack) {
-  rtc::CritScope cs(&_apiCs);
+  MutexLock lock(&api_lock_);
   _dataCallBack = dataCallBack;
 }
 
 void VideoCaptureImpl::DeRegisterCaptureDataCallback() {
-  rtc::CritScope cs(&_apiCs);
+  MutexLock lock(&api_lock_);
   _dataCallBack = NULL;
 }
 int32_t VideoCaptureImpl::DeliverCapturedFrame(VideoFrame& captureFrame) {
@@ -118,7 +118,7 @@
                                         size_t videoFrameLength,
                                         const VideoCaptureCapability& frameInfo,
                                         int64_t captureTime /*=0*/) {
-  rtc::CritScope cs(&_apiCs);
+  MutexLock lock(&api_lock_);
 
   const int32_t width = frameInfo.width;
   const int32_t height = frameInfo.height;
@@ -223,7 +223,7 @@
 }
 
 int32_t VideoCaptureImpl::SetCaptureRotation(VideoRotation rotation) {
-  rtc::CritScope cs(&_apiCs);
+  MutexLock lock(&api_lock_);
   _rotateFrame = rotation;
   return 0;
 }
diff --git a/modules/video_capture/video_capture_impl.h b/modules/video_capture/video_capture_impl.h
index 197bfd38..cbc99b7 100644
--- a/modules/video_capture/video_capture_impl.h
+++ b/modules/video_capture/video_capture_impl.h
@@ -25,7 +25,7 @@
 #include "modules/video_capture/video_capture.h"
 #include "modules/video_capture/video_capture_config.h"
 #include "modules/video_capture/video_capture_defines.h"
-#include "rtc_base/critical_section.h"
+#include "rtc_base/synchronization/mutex.h"
 
 namespace webrtc {
 
@@ -78,7 +78,7 @@
   ~VideoCaptureImpl() override;
 
   char* _deviceUniqueId;  // current Device unique name;
-  rtc::CriticalSection _apiCs;
+  Mutex api_lock_;
   VideoCaptureCapability _requestedCapability;  // Should be set by platform
                                                 // dependent code in
                                                 // StartCapture.
diff --git a/modules/video_capture/windows/video_capture_ds.cc b/modules/video_capture/windows/video_capture_ds.cc
index 615a1b5..6dca747 100644
--- a/modules/video_capture/windows/video_capture_ds.cc
+++ b/modules/video_capture/windows/video_capture_ds.cc
@@ -130,7 +130,7 @@
 }
 
 int32_t VideoCaptureDS::StartCapture(const VideoCaptureCapability& capability) {
-  rtc::CritScope cs(&_apiCs);
+  MutexLock lock(&api_lock_);
 
   if (capability != _requestedCapability) {
     DisconnectGraph();
@@ -148,7 +148,7 @@
 }
 
 int32_t VideoCaptureDS::StopCapture() {
-  rtc::CritScope cs(&_apiCs);
+  MutexLock lock(&api_lock_);
 
   HRESULT hr = _mediaControl->Pause();
   if (FAILED(hr)) {