Add support for switching the audio output device for HTMLMediaElements.

media/blink/webaudiosourceprovider_impl.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.
 
 #ifndef MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_
 #define MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_
 
+#include <string>
+
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/lock.h"
 #include "media/base/audio_renderer_sink.h"
 #include "media/base/media_export.h"
 #include "third_party/WebKit/public/platform/WebAudioSourceProvider.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 
 namespace blink {
 class WebAudioSourceProviderClient;
@@ skipping 21 matching lines @@
   virtual void setClient(blink::WebAudioSourceProviderClient* client);
   virtual void provideInput(const blink::WebVector<float*>& audio_data,
                             size_t number_of_frames);
 
   // AudioRendererSink implementation.
   void Start() override;
   void Stop() override;
   void Play() override;
   void Pause() override;
   bool SetVolume(double volume) override;
+  void SwitchOutputDevice(const std::string& device_id,
+                          const GURL& security_origin,
+                          const base::Callback<void(int)>& callback) override;
   void Initialize(const AudioParameters& params,
                   RenderCallback* renderer) override;
 
  protected:
   virtual ~WebAudioSourceProviderImpl();
 
  private:
   // Calls setFormat() on |client_| from the Blink renderer thread.
   void OnSetFormat();
 
@@ skipping 22 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_