Add support for switching the audio output device for HTMLMediaElements.

content/renderer/media/webrtc_audio_renderer.cc

 // 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.
 
 #include "content/renderer/media/webrtc_audio_renderer.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 88 matching lines @@
     delegate_->Stop();
   }
 
   void SetVolume(float volume) override {
     DCHECK(thread_checker_.CalledOnValidThread());
     DCHECK(volume >= 0.0f && volume <= 1.0f);
     playing_state_.set_volume(volume);
     on_play_state_changed_.Run(media_stream_, &playing_state_);
   }
 
+  void SwitchOutputDevice(const std::string& device_id,
+                          const GURL& security_origin,
+                          const base::Callback<void(int)>& callback) override {
+    DCHECK(thread_checker_.CalledOnValidThread());
+    DVLOG(1) << __PRETTY_FUNCTION__;
+    delegate_->SwitchOutputDevice(device_id, security_origin, callback);
+  }
+
   base::TimeDelta GetCurrentRenderTime() const override {
     DCHECK(thread_checker_.CalledOnValidThread());
     return delegate_->GetCurrentRenderTime();
   }
 
   bool IsLocalRenderer() const override {
     DCHECK(thread_checker_.CalledOnValidThread());
     return delegate_->IsLocalRenderer();
   }
 
@@ skipping 280 matching lines @@
 }
 
 void WebRtcAudioRenderer::SetVolume(float volume) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(volume >= 0.0f && volume <= 1.0f);
 
   playing_state_.set_volume(volume);
   OnPlayStateChanged(media_stream_, &playing_state_);
 }
 
+void WebRtcAudioRenderer::SwitchOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    const base::Callback<void(int)>& callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DVLOG(1) << __PRETTY_FUNCTION__;
+  sink_->SwitchOutputDevice(device_id, security_origin, callback);
+}
+
 base::TimeDelta WebRtcAudioRenderer::GetCurrentRenderTime() const {
   DCHECK(thread_checker_.CalledOnValidThread());
   base::AutoLock auto_lock(lock_);
   return current_time_;
 }
 
 bool WebRtcAudioRenderer::IsLocalRenderer() const {
   return false;
 }
 
@@ skipping 137 matching lines @@
       if (RemovePlayingState(source, state))
         EnterPauseState();
     } else if (AddPlayingState(source, state)) {
       EnterPlayState();
     }
     UpdateSourceVolume(source);
   }
 }
 
 }  // namespace content