Adding some features to proxy.h, and restructuring the macros.

webrtc/api/rtpreceiverinterface.h

 /*
  *  Copyright 2015 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.
  */
 
@@ skipping 48 matching lines @@
   // Does not take ownership of observer.
   // Must call SetObserver(nullptr) before the observer is destroyed.
   virtual void SetObserver(RtpReceiverObserverInterface* observer) = 0;
 
  protected:
   virtual ~RtpReceiverInterface() {}
 };
 
 // Define proxy for RtpReceiverInterface.
 BEGIN_SIGNALING_PROXY_MAP(RtpReceiver)
-PROXY_CONSTMETHOD0(rtc::scoped_refptr<MediaStreamTrackInterface>, track)
-PROXY_CONSTMETHOD0(cricket::MediaType, media_type)
-PROXY_CONSTMETHOD0(std::string, id)
-PROXY_CONSTMETHOD0(RtpParameters, GetParameters);
-PROXY_METHOD1(bool, SetParameters, const RtpParameters&)
-PROXY_METHOD1(void, SetObserver, RtpReceiverObserverInterface*);
-END_SIGNALING_PROXY()
+  PROXY_SIGNALING_THREAD_DESTRUCTOR()
+  PROXY_CONSTMETHOD0(rtc::scoped_refptr<MediaStreamTrackInterface>, track)
+  PROXY_CONSTMETHOD0(cricket::MediaType, media_type)
+  PROXY_CONSTMETHOD0(std::string, id)
+  PROXY_CONSTMETHOD0(RtpParameters, GetParameters);
+  PROXY_METHOD1(bool, SetParameters, const RtpParameters&)
+  PROXY_METHOD1(void, SetObserver, RtpReceiverObserverInterface*);
+END_PROXY_MAP()
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_RTPRECEIVERINTERFACE_H_