Add support for switching the audio output device for HTMLMediaElements.

media/base/mock_filters.h

Index: media/base/mock_filters.h
diff --git a/media/base/mock_filters.h b/media/base/mock_filters.h
index 31358758079e8d8d99db0c5b5633bf870cfeff87..f7c8319756094e50e1f5f36fc55333023737ecc5 100644
--- a/media/base/mock_filters.h
+++ b/media/base/mock_filters.h
@@ -158,6 +158,10 @@ class MockAudioRenderer : public AudioRenderer {
   MOCK_METHOD1(Flush, void(const base::Closure& callback));
   MOCK_METHOD0(StartPlaying, void());
   MOCK_METHOD1(SetVolume, void(float volume));
+  MOCK_METHOD3(SwitchOutputDevice,
+               void(const std::string& device_id,
+                    const GURL& security_origin,
+                    const base::Callback<void(int)>& callback));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockAudioRenderer);
@@ -181,6 +185,10 @@ class MockRenderer : public Renderer {
   MOCK_METHOD1(StartPlayingFrom, void(base::TimeDelta timestamp));
   MOCK_METHOD1(SetPlaybackRate, void(double playback_rate));
   MOCK_METHOD1(SetVolume, void(float volume));
+  MOCK_METHOD3(SwitchAudioOutputDevice,
+               void(const std::string& device_id,
+                    const GURL& security_origin,
+                    const base::Callback<void(int)>& callback));
   MOCK_METHOD0(GetMediaTime, base::TimeDelta());
   MOCK_METHOD0(HasAudio, bool());
   MOCK_METHOD0(HasVideo, bool());