Interface RTCRtpReceiver and RTCPeerConnection.getReceivers() added.

content/renderer/media/webrtc/rtc_rtp_receiver.h

Index: content/renderer/media/webrtc/rtc_rtp_receiver.h
diff --git a/content/renderer/media/webrtc/rtc_rtp_receiver.h b/content/renderer/media/webrtc/rtc_rtp_receiver.h
new file mode 100644
index 0000000000000000000000000000000000000000..5bba6c395f744680ecdcd0200f1cb2424adb111c
--- /dev/null
+++ b/content/renderer/media/webrtc/rtc_rtp_receiver.h
@@ -0,0 +1,43 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_RENDERER_MEDIA_WEBRTC_RTC_RTP_RECEIVER_H_
+#define CONTENT_RENDERER_MEDIA_WEBRTC_RTC_RTP_RECEIVER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "content/common/content_export.h"
+#include "third_party/WebKit/public/platform/WebMediaStreamTrack.h"
+#include "third_party/WebKit/public/platform/WebRTCRtpReceiver.h"
+#include "third_party/webrtc/api/rtpreceiverinterface.h"
+
+namespace content {
+
+// Used to surface |webrtc::RtpReceiverInterface| to blink. Multiple
+// |RTCRtpReceiver|s could reference the same webrtc receiver; |id| is the value
+// of the pointer to the webrtc receiver.
+class CONTENT_EXPORT RTCRtpReceiver : public blink::WebRTCRtpReceiver {
+ public:
+  static uintptr_t getId(
+      const webrtc::RtpReceiverInterface* webrtc_rtp_receiver);
+
+  RTCRtpReceiver(webrtc::RtpReceiverInterface* webrtc_rtp_receiver,
+                 const blink::WebMediaStreamTrack& web_track);
+  ~RTCRtpReceiver() override;
+
+  uintptr_t id() const override;
+
+  const blink::WebMediaStreamTrack& track() const override;
+  const webrtc::MediaStreamTrackInterface& webrtc_track() const;
+
+ private:
+  const scoped_refptr<webrtc::RtpReceiverInterface> webrtc_rtp_receiver_;
+  const blink::WebMediaStreamTrack web_track_;
+
+  DISALLOW_COPY_AND_ASSIGN(RTCRtpReceiver);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_WEBRTC_RTC_RTP_RECEIVER_H_