Remove VideoDecoder::PrepareForShutdownHack() and friends.

content/renderer/media/rtc_video_decoder.h

Index: content/renderer/media/rtc_video_decoder.h
diff --git a/content/renderer/media/rtc_video_decoder.h b/content/renderer/media/rtc_video_decoder.h
index 857cc99c9158f6137b1436d7b50d0479b93e3121..9c870536acfd96a77ab5d3b55233d54082888595 100644
--- a/content/renderer/media/rtc_video_decoder.h
+++ b/content/renderer/media/rtc_video_decoder.h
@@ -44,7 +44,6 @@ class CONTENT_EXPORT RTCVideoDecoder
   virtual void Read(const ReadCB& read_cb) OVERRIDE;
   virtual void Reset(const base::Closure& closure) OVERRIDE;
   virtual void Stop(const base::Closure& closure) OVERRIDE;
-  virtual void PrepareForShutdownHack() OVERRIDE;
 
   // webrtc::VideoRendererInterface implementation
   virtual void SetSize(int width, int height) OVERRIDE;
@@ -59,7 +58,6 @@ class CONTENT_EXPORT RTCVideoDecoder
   FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, DoReset);
   FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, DoRenderFrame);
   FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, DoSetSize);
-  FRIEND_TEST_ALL_PREFIXES(RTCVideoDecoderTest, ReadAndShutdown);
 
   enum DecoderState {
     kUnInitialized,
@@ -82,7 +80,6 @@ class CONTENT_EXPORT RTCVideoDecoder
   DecoderState state_;
   ReadCB read_cb_;
   bool got_first_frame_;
-  bool shutting_down_;
   base::TimeDelta last_frame_timestamp_;
   base::TimeDelta start_time_;
   // The video track the renderer is connected to.