Updates to VCMDecodedFrameCallback, VideoReceiver and a few related classes/tests.

webrtc/modules/video_coding/video_coding_impl.h

Index: webrtc/modules/video_coding/video_coding_impl.h
diff --git a/webrtc/modules/video_coding/video_coding_impl.h b/webrtc/modules/video_coding/video_coding_impl.h
index a45105a6ced3ea2c30b0499c1abe12828e3ab41c..30641dcf2fd52750c51131ecc54458186b96cf25 100644
--- a/webrtc/modules/video_coding/video_coding_impl.h
+++ b/webrtc/modules/video_coding/video_coding_impl.h
@@ -18,8 +18,9 @@
 #include <vector>
 
 #include "webrtc/base/onetimeevent.h"
-#include "webrtc/base/thread_annotations.h"
 #include "webrtc/base/sequenced_task_checker.h"
+#include "webrtc/base/thread_annotations.h"
+#include "webrtc/base/thread_checker.h"
 #include "webrtc/common_video/include/frame_callback.h"
 #include "webrtc/modules/video_coding/codec_database.h"
 #include "webrtc/modules/video_coding/frame_buffer.h"
@@ -171,6 +172,9 @@ class VideoReceiver : public Module {
 
   int32_t Decode(const webrtc::VCMEncodedFrame* frame);
 
+  // Called on the decoder thread when thread is exiting.
+  void DecodingStopped();
+
   int32_t ReceiveCodec(VideoCodec* currentReceiveCodec) const;
   VideoCodecType ReceiveCodec() const;
 
@@ -206,6 +210,7 @@ class VideoReceiver : public Module {
   int32_t RequestSliceLossIndication(const uint64_t pictureID) const;
 
  private:
+  rtc::ThreadChecker construction_thread_;
   Clock* const clock_;
   rtc::CriticalSection process_crit_;
   rtc::CriticalSection receive_crit_;
@@ -216,7 +221,6 @@ class VideoReceiver : public Module {
   VCMReceiveStatisticsCallback* _receiveStatsCallback GUARDED_BY(process_crit_);
   VCMDecoderTimingCallback* _decoderTimingCallback GUARDED_BY(process_crit_);
   VCMPacketRequestCallback* _packetRequestCallback GUARDED_BY(process_crit_);
-  VCMGenericDecoder* _decoder;
 
   VCMFrameBuffer _frameFromFile;
   bool _scheduleKeyRequest GUARDED_BY(process_crit_);