Interface RTCRtpReceiver and RTCPeerConnection.getReceivers() added.

third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h

Index: third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h
diff --git a/third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h b/third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h
index 73931a21f806cc3a637d2d05bdfc125e8e50188e..f70240b36100388bcd6f9885966fc099c11b4101 100644
--- a/third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h
+++ b/third_party/WebKit/public/platform/WebRTCPeerConnectionHandler.h
@@ -32,6 +32,7 @@
 #define WebRTCPeerConnectionHandler_h
 
 #include "WebRTCStats.h"
+#include "WebVector.h"
 
 namespace blink {
 
@@ -44,6 +45,7 @@ class WebRTCDataChannelHandler;
 enum class WebRTCErrorType;
 class WebRTCICECandidate;
 class WebRTCOfferOptions;
+class WebRTCRtpReceiver;
 class WebRTCSessionDescription;
 class WebRTCSessionDescriptionRequest;
 class WebRTCStatsRequest;
@@ -92,6 +94,10 @@ class WebRTCPeerConnectionHandler {
   virtual WebRTCDataChannelHandler* createDataChannel(
       const WebString& label,
       const WebRTCDataChannelInit&) = 0;
+  // Gets receivers used by the peer connection. These are wrappers referencing
+  // webrtc-layer receivers, multiple |WebRTCRtpReceiver| objects referencing
+  // the same webrtc-layer receiver have the same |id|.
+  virtual WebVector<std::unique_ptr<WebRTCRtpReceiver>> getReceivers() = 0;
   virtual WebRTCDTMFSenderHandler* createDTMFSender(
       const WebMediaStreamTrack&) = 0;
   virtual void stop() = 0;