Move responsibility for RTP header extensions on video receive.

webrtc/pc/fakemediacontroller.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 14 matching lines @@
     RTC_DCHECK(nullptr != channel_manager_);
     RTC_DCHECK(nullptr != call_);
   }
   ~FakeMediaController() override {}
   void Close() override {}
   webrtc::Call* call_w() override { return call_; }
   cricket::ChannelManager* channel_manager() const override {
     return channel_manager_;
   }
   const MediaConfig& config() const override { return media_config_; }
+  void SetVideoReceiveRtpHeaderExtensions(
+      const std::vector<webrtc::RtpExtension>& extensions) override {}
 
  private:
   const MediaConfig media_config_ = MediaConfig();
   cricket::ChannelManager* channel_manager_;
   webrtc::Call* call_;
 };
 }  // namespace cricket
 #endif  // WEBRTC_PC_FAKEMEDIACONTROLLER_H_