Avoid busy looping as the VideoReceiveStream is shut down.

webrtc/video/video_receive_stream.h

 /*
  *  Copyright (c) 2013 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 93 matching lines @@
       std::unique_ptr<video_coding::FrameObject> frame) override;
 
   // Implements Syncable.
   int id() const override;
   rtc::Optional<Syncable::Info> GetInfo() const override;
   uint32_t GetPlayoutTimestamp() const override;
   void SetMinimumPlayoutDelay(int delay_ms) override;
 
  private:
   static bool DecodeThreadFunction(void* ptr);
-  void Decode();
+  bool Decode();
 
   rtc::ThreadChecker worker_thread_checker_;
   rtc::ThreadChecker module_process_thread_checker_;
 
   TransportAdapter transport_adapter_;
   const VideoReceiveStream::Config config_;
   const int num_cpu_cores_;
   const bool protected_by_flexfec_;
   ProcessThread* const process_thread_;
   Clock* const clock_;
@@ skipping 14 matching lines @@
   std::unique_ptr<IvfFileWriter> ivf_writer_ GUARDED_BY(ivf_writer_lock_);
 
   // Members for the new jitter buffer experiment.
   std::unique_ptr<VCMJitterEstimator> jitter_estimator_;
   std::unique_ptr<video_coding::FrameBuffer> frame_buffer_;
 };
 }  // namespace internal
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIDEO_RECEIVE_STREAM_H_