Use base::Optional for selected video track.

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.
 
 #ifndef MEDIA_BASE_MOCK_FILTERS_H_
 #define MEDIA_BASE_MOCK_FILTERS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 67 matching lines @@
   MOCK_METHOD2(Seek, void(base::TimeDelta, const PipelineStatusCB&));
   MOCK_METHOD1(Suspend, void(const PipelineStatusCB&));
   MOCK_METHOD3(Resume,
                void(std::unique_ptr<Renderer>*,
                     base::TimeDelta,
                     const PipelineStatusCB&));
 
   MOCK_METHOD1(OnEnabledAudioTracksChanged,
                void(const std::vector<MediaTrack::Id>&));
   MOCK_METHOD1(OnSelectedVideoTrackChanged,
-               void(const std::vector<MediaTrack::Id>&));
+               void(base::Optional<MediaTrack::Id>));
 
   // TODO(sandersd): This should automatically return true between Start() and
   // Stop(). (Or better, remove it from the interface entirely.)
   MOCK_CONST_METHOD0(IsRunning, bool());
 
   // TODO(sandersd): These should be regular getters/setters.
   MOCK_CONST_METHOD0(GetPlaybackRate, double());
   MOCK_METHOD1(SetPlaybackRate, void(double));
   MOCK_CONST_METHOD0(GetVolume, float());
   MOCK_METHOD1(SetVolume, void(float));
@@ skipping 36 matching lines @@
   MOCK_METHOD0(AbortPendingReads, void());
   MOCK_METHOD0(GetAllStreams, std::vector<DemuxerStream*>());
   MOCK_METHOD1(SetStreamStatusChangeCB, void(const StreamStatusChangeCB& cb));
 
   MOCK_CONST_METHOD0(GetStartTime, base::TimeDelta());
   MOCK_CONST_METHOD0(GetTimelineOffset, base::Time());
   MOCK_CONST_METHOD0(GetMemoryUsage, int64_t());
   MOCK_METHOD2(OnEnabledAudioTracksChanged,
                void(const std::vector<MediaTrack::Id>&, base::TimeDelta));
   MOCK_METHOD2(OnSelectedVideoTrackChanged,
-               void(const std::vector<MediaTrack::Id>&, base::TimeDelta));
+               void(base::Optional<MediaTrack::Id>, base::TimeDelta));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockDemuxer);
 };
 
 class MockDemuxerStream : public DemuxerStream {
  public:
   explicit MockDemuxerStream(DemuxerStream::Type type);
   virtual ~MockDemuxerStream();
 
@@ skipping 426 matching lines @@
   MOCK_METHOD0(Flush, void());
   MOCK_METHOD2(Parse, bool(const uint8_t*, int));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockStreamParser);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_FILTERS_H_