Add setSinkId method to WebMediaPlayer.

public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebMediaPlayer_h
 #define WebMediaPlayer_h
 
+#include "WebCallbacks.h"
 #include "WebCanvas.h"
 #include "WebContentDecryptionModule.h"
 #include "WebMediaSource.h"
+#include "WebSetSinkIdError.h"
 #include "WebString.h"
 #include "WebTimeRange.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 
 namespace blink {
 
 class WebAudioSourceProvider;
 class WebContentDecryptionModule;
 class WebString;
 class WebURL;
@@ skipping 54 matching lines @@
 
     virtual void load(LoadType, const WebURL&, CORSMode) = 0;
 
     // Playback controls.
     virtual void play() = 0;
     virtual void pause() = 0;
     virtual bool supportsSave() const = 0;
     virtual void seek(double seconds) = 0;
     virtual void setRate(double) = 0;
     virtual void setVolume(double) = 0;
+
     virtual void requestRemotePlayback() { };
     virtual void requestRemotePlaybackControl() { };
     virtual void setPreload(Preload) { };
     virtual WebTimeRanges buffered() const = 0;
     virtual WebTimeRanges seekable() const = 0;
 
+    // Attempts to switch the audio output device.
+    // Implementations of setSinkId take ownership of the WebCallbacks
+    // object, and the WebCallbacks object takes ownership of the returned
+    // error value, if any.
+    // Note also that setSinkId implementations must make sure that all
+    // methods of the WebCallbacks object, including constructors and
+    // destructors, run in the same thread where the object is created
+    // (i.e., the blink thread).
+    virtual void setSinkId(const WebString& deviceId, WebCallbacks<void, WebSetSinkIdError>*) = 0;
+
     // True if the loaded media has a playable video/audio track.
     virtual bool hasVideo() const = 0;
     virtual bool hasAudio() const = 0;
 
     // True if the media is being played on a remote device.
     virtual bool isRemote() const { return false; }
 
     // Dimension of the video.
     virtual WebSize naturalSize() const = 0;
 
@@ skipping 42 matching lines @@
     virtual void enterFullscreen() { }
 
     virtual void enabledAudioTracksChanged(const WebVector<TrackId>& enabledTrackIds) { }
     // |selectedTrackId| is null if no track is selected.
     virtual void selectedVideoTrackChanged(TrackId* selectedTrackId) { }
 };
 
 } // namespace blink
 
 #endif