Add support for switching the audio output device for HTMLMediaElements.

media/renderers/renderer_impl.cc

 // Copyright 2014 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 "media/renderers/renderer_impl.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 177 matching lines @@
 }
 
 void RendererImpl::SetVolume(float volume) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (audio_renderer_)
     audio_renderer_->SetVolume(volume);
 }
 
+void RendererImpl::SwitchAudioOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    const base::Callback<void(int)>& callback) {
+  DCHECK(task_runner_->BelongsToCurrentThread());
+  DVLOG(1) << __FUNCTION__ << "(" << device_id << ", "
+           << security_origin << ")";
+
+  if (audio_renderer_)
+    audio_renderer_->SwitchOutputDevice(device_id, security_origin, callback);
+}
+
 base::TimeDelta RendererImpl::GetMediaTime() {
   // No BelongsToCurrentThread() checking because this can be called from other
   // threads.
   return time_source_->CurrentMediaTime();
 }
 
 bool RendererImpl::HasAudio() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   return audio_renderer_ != NULL;
 }
@@ skipping 423 matching lines @@
   }
 
   // After OnError() returns, the pipeline may destroy |this|.
   base::ResetAndReturn(&error_cb_).Run(error);
 
   if (!flush_cb_.is_null())
     base::ResetAndReturn(&flush_cb_).Run();
 }
 
 }  // namespace media