Replace VideoDecoder::media_format() with significantly simpler width()/height() methods.

media/base/mock_filters.h

 // Copyright (c) 2011 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 (i.e., copying data to the
 // buffer passed into MockDataSource::Read()).
 //
 // 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.
@@ skipping 167 matching lines @@
   // Filter implementation.
   MOCK_METHOD1(Stop, void(FilterCallback* callback));
   MOCK_METHOD1(SetPlaybackRate, void(float playback_rate));
   MOCK_METHOD2(Seek, void(base::TimeDelta time, const FilterStatusCB& cb));
   MOCK_METHOD0(OnAudioRendererDisabled, void());
 
   // VideoDecoder implementation.
   MOCK_METHOD3(Initialize, void(DemuxerStream* stream,
                                 FilterCallback* callback,
                                 StatisticsCallback* stats_callback));
-  MOCK_METHOD0(media_format, const MediaFormat&());
   MOCK_METHOD1(ProduceVideoFrame, void(scoped_refptr<VideoFrame>));
   MOCK_METHOD0(ProvidesBuffer, bool());
+  MOCK_METHOD0(width, int());
+  MOCK_METHOD0(height, int());
 
   void VideoFrameReadyForTest(scoped_refptr<VideoFrame> frame) {
     VideoDecoder::VideoFrameReady(frame);
   }
 
  protected:
   virtual ~MockVideoDecoder();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockVideoDecoder);
@@ skipping 152 matching lines @@
  public:
   MockStatisticsCallback();
   ~MockStatisticsCallback();
 
   MOCK_METHOD1(OnStatistics, void(const media::PipelineStatistics& statistics));
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_FILTERS_H_