Delete struct webrtc::PacketTime.

Replaced by a int64_t representing time in us.

Bug: webtrc:9584
Change-Id: I0505c020ef741ad940203ec300e8adb103856dda
Reviewed-on: https://webrtc-review.googlesource.com/91840
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24204}
diff --git a/call/packet_receiver.h b/call/packet_receiver.h
new file mode 100644
index 0000000..2a0e3ef
--- /dev/null
+++ b/call/packet_receiver.h
@@ -0,0 +1,48 @@
+/*
+ *  Copyright (c) 2018 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 CALL_PACKET_RECEIVER_H_
+#define CALL_PACKET_RECEIVER_H_
+
+#include <algorithm>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "api/mediatypes.h"
+#include "common_types.h"  // NOLINT(build/include)
+#include "rtc_base/copyonwritebuffer.h"
+
+namespace webrtc {
+
+class PacketReceiver {
+ public:
+  enum DeliveryStatus {
+    DELIVERY_OK,
+    DELIVERY_UNKNOWN_SSRC,
+    DELIVERY_PACKET_ERROR,
+  };
+
+  virtual DeliveryStatus DeliverPacket(MediaType media_type,
+                                       rtc::CopyOnWriteBuffer packet,
+                                       int64_t packet_time_us);
+
+  // TODO(bugs.webrtc.org/9584): Deprecated. Over the transition, default
+  // implementations are used, and subclasses must override one or the other.
+  virtual DeliveryStatus DeliverPacket(MediaType media_type,
+                                       rtc::CopyOnWriteBuffer packet,
+                                       const PacketTime& packet_time);
+
+ protected:
+  virtual ~PacketReceiver() {}
+};
+
+}  // namespace webrtc
+
+#endif  // CALL_PACKET_RECEIVER_H_