Remove VideoDecoder::PrepareForShutdownHack() and friends.

media/base/mock_filters.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.
 //
 // A new breed of mock media filters, this time using gmock!  Feel free to add
 // actions if you need interesting side-effects.
 //
 // Don't forget you can use StrictMock<> and NiceMock<> if you want the mock
 // filters to fail the test or do nothing when an unexpected method is called.
 // http://code.google.com/p/googlemock/wiki/CookBook#Nice_Mocks_and_Strict_Mocks
@@ skipping 135 matching lines @@
                                  const base::Closure& ended_cb,
                                  const PipelineStatusCB& error_cb,
                                  const TimeDeltaCB& get_time_cb,
                                  const TimeDeltaCB& get_duration_cb));
   MOCK_METHOD1(Play, void(const base::Closure& callback));
   MOCK_METHOD1(Pause, void(const base::Closure& callback));
   MOCK_METHOD1(Flush, void(const base::Closure& callback));
   MOCK_METHOD2(Preroll, void(base::TimeDelta time, const PipelineStatusCB& cb));
   MOCK_METHOD1(Stop, void(const base::Closure& callback));
   MOCK_METHOD1(SetPlaybackRate, void(float playback_rate));
-  virtual void PrepareForShutdownHack() {}
 
  protected:
   virtual ~MockVideoRenderer();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockVideoRenderer);
 };
 
 class MockAudioRenderer : public AudioRenderer {
  public:
@@ skipping 118 matching lines @@
  public:
   MockStatisticsCB();
   ~MockStatisticsCB();
 
   MOCK_METHOD1(OnStatistics, void(const media::PipelineStatistics& statistics));
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_FILTERS_H_