Add support for switching the audio output device for HTMLMediaElements.

media/renderers/audio_renderer_impl.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 "media/renderers/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include <algorithm>
 
@@ skipping 378 matching lines @@
   DCHECK(!sink_playing_);
   base::ResetAndReturn(&init_cb_).Run(PIPELINE_OK);
 }
 
 void AudioRendererImpl::SetVolume(float volume) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(sink_.get());
   sink_->SetVolume(volume);
 }
 
+void AudioRendererImpl::SwitchOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    const base::Callback<void(int)>& callback) {
+  DCHECK(task_runner_->BelongsToCurrentThread());
+  DCHECK(sink_.get());
+  DVLOG(1) << __FUNCTION__ << "(" << device_id << ", " << security_origin << ")"
+           << ". Forwarding to sink " << sink_ << ".";
+  sink_->SwitchOutputDevice(device_id, security_origin, callback);
+}
+
 void AudioRendererImpl::DecodedAudioReady(
     AudioBufferStream::Status status,
     const scoped_refptr<AudioBuffer>& buffer) {
   DVLOG(2) << __FUNCTION__ << "(" << status << ")";
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   base::AutoLock auto_lock(lock_);
   DCHECK(state_ != kUninitialized);
 
   CHECK(pending_read_);
@@ skipping 353 matching lines @@
            << buffering_state;
   DCHECK_NE(buffering_state_, buffering_state);
   lock_.AssertAcquired();
   buffering_state_ = buffering_state;
 
   task_runner_->PostTask(FROM_HERE,
                          base::Bind(buffering_state_cb_, buffering_state_));
 }
 
 }  // namespace media