Add support for switching the audio output device for HTMLMediaElements.

media/base/mock_audio_renderer_sink.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_AUDIO_RENDERER_SINK_H_
 #define MEDIA_BASE_MOCK_AUDIO_RENDERER_SINK_H_
 
+#include <string>
+
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_renderer_sink.h"
 #include "testing/gmock/include/gmock/gmock.h"
+#include "url/gurl.h"
 
 namespace media {
 
 class MockAudioRendererSink : public AudioRendererSink {
  public:
   MockAudioRendererSink();
 
   MOCK_METHOD0(Start, void());
   MOCK_METHOD0(Stop, void());
   MOCK_METHOD0(Pause, void());
   MOCK_METHOD0(Play, void());
   MOCK_METHOD1(SetVolume, bool(double volume));
+  MOCK_METHOD3(SwitchOutputDevice,
+               void(const std::string& device_id,
+                    const GURL& security_origin,
+                    const base::Callback<void(int)>& callback));
 
   void Initialize(const AudioParameters& params,
                   RenderCallback* renderer) override;
   AudioRendererSink::RenderCallback* callback() { return callback_; }
 
  protected:
   ~MockAudioRendererSink() override;
 
  private:
   RenderCallback* callback_;
 
   DISALLOW_COPY_AND_ASSIGN(MockAudioRendererSink);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MOCK_AUDIO_RENDERER_SINK_H_