Add SupportsConfigChanges() to DemuxerStream.

media/base/fake_text_track_stream.h

 // Copyright 2013 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.
 
 #include "base/message_loop/message_loop.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/demuxer_stream.h"
 #include "media/base/video_decoder_config.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace media {
 
 // Fake implementation of the DemuxerStream.  These are the stream objects
 // we pass to the text renderer object when streams are added and removed.
 class FakeTextTrackStream : public DemuxerStream {
  public:
   FakeTextTrackStream();
   virtual ~FakeTextTrackStream();
 
   // DemuxerStream implementation.
   virtual void Read(const ReadCB&) OVERRIDE;
   MOCK_METHOD0(audio_decoder_config, AudioDecoderConfig());
   MOCK_METHOD0(video_decoder_config, VideoDecoderConfig());
   virtual Type type() OVERRIDE;
   MOCK_METHOD0(EnableBitstreamConverter, void());
+  virtual bool SupportsConfigChanges();
 
   void SatisfyPendingRead(const base::TimeDelta& start,
                           const base::TimeDelta& duration,
                           const std::string& id,
                           const std::string& content,
                           const std::string& settings);
   void AbortPendingRead();
   void SendEosNotification();
 
   void Stop();
 
   MOCK_METHOD0(OnRead, void());
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   ReadCB read_cb_;
   bool stopping_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeTextTrackStream);
 };
 
 }  // namespace media