Remove VideoDecoder::PrepareForShutdownHack() and friends.

media/base/pipeline.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_PIPELINE_H_
 #define MEDIA_BASE_PIPELINE_H_
 
 #include <string>
 
 #include "base/gtest_prod_util.h"
@@ skipping 434 matching lines @@
   PipelineStatusCB seek_cb_;
 
   // Temporary callback used for Stop().
   base::Closure stop_cb_;
 
   // Permanent callbacks passed in via Start().
   PipelineStatusCB ended_cb_;
   PipelineStatusCB error_cb_;
   BufferingStateCB buffering_state_cb_;
 
-  // Audio renderer reference used for setting the volume and determining
-  // when playback has finished.
+  // Renderer references used for setting the volume, playback rate, and
+  // determining when playback has finished.
   scoped_refptr<AudioRenderer> audio_renderer_;
-
-  // Video Renderer reference used for determining when playback has finished
-  // and for signalling imminent shutdown.
-  // The signalling imminent shutdown is a HACK necessary because
-  // WebMediaPlayerImpl::Destroy() holds the render thread loop hostage
-  // until PipelineImpl::Stop() calls its callback.
-  // http://crbug.com/110228 tracks removing this hack.
   scoped_refptr<VideoRenderer> video_renderer_;
 
   // Demuxer reference used for setting the preload value.
   scoped_refptr<Demuxer> demuxer_;
 
   // Audio decoder reference used during initialization.
   //
   // TODO(scherkus): Remove after renderers do initialization, see
   // http://crbug.com/145635
   scoped_refptr<AudioDecoder> audio_decoder_;
 
   PipelineStatistics statistics_;
 
   // Time of pipeline creation; is non-zero only until the pipeline first
   // reaches "kStarted", at which point it is used & zeroed out.
   base::Time creation_time_;
 
   scoped_ptr<SerialRunner> pending_callbacks_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(Pipeline);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_PIPELINE_H_