Rename BEGIN_PROXY_MAP --> BEGIN_SIGNALLING_PROXY_MAP.

webrtc/api/rtpreceiverinterface.h

Index: webrtc/api/rtpreceiverinterface.h
diff --git a/webrtc/api/rtpreceiverinterface.h b/webrtc/api/rtpreceiverinterface.h
index 5c7790db607f47d14bab797b60a8617c4eef61ae..6a4720a6834143e372011876f8ad850c4c688c2b 100644
--- a/webrtc/api/rtpreceiverinterface.h
+++ b/webrtc/api/rtpreceiverinterface.h
@@ -38,11 +38,11 @@ class RtpReceiverInterface : public rtc::RefCountInterface {
 };
 
 // Define proxy for RtpReceiverInterface.
-BEGIN_PROXY_MAP(RtpReceiver)
+BEGIN_SIGNALLING_PROXY_MAP(RtpReceiver)
 PROXY_CONSTMETHOD0(rtc::scoped_refptr<MediaStreamTrackInterface>, track)
 PROXY_CONSTMETHOD0(std::string, id)
 PROXY_METHOD0(void, Stop)
-END_PROXY()
+END_SIGNALLING_PROXY()
 
 }  // namespace webrtc