Add support for switching the audio output device for HTMLMediaElements.

content/renderer/pepper/pepper_platform_audio_output.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/pepper/pepper_platform_audio_output.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "build/build_config.h"
@@ skipping 82 matching lines @@
     main_message_loop_proxy_->PostTask(
         FROM_HERE,
         base::Bind(&PepperPlatformAudioOutput::OnStreamCreated,
                    this,
                    handle,
                    socket_handle,
                    length));
   }
 }
 
+void PepperPlatformAudioOutput::OnDeviceSwitched(
+    int request_id,
+    media::AudioOutputIPCDelegate::DeviceSwitchResult result) {}
+
 void PepperPlatformAudioOutput::OnIPCClosed() { ipc_.reset(); }
 
 PepperPlatformAudioOutput::~PepperPlatformAudioOutput() {
   // Make sure we have been shut down. Warning: this will usually happen on
   // the I/O thread!
   DCHECK(!ipc_);
   DCHECK(!client_);
 }
 
 PepperPlatformAudioOutput::PepperPlatformAudioOutput()
@@ skipping 55 matching lines @@
     return;
 
   ipc_->CloseStream();
   ipc_.reset();
 
   Release();  // Release for the delegate, balances out the reference taken in
               // PepperPlatformAudioOutput::Create.
 }
 
 }  // namespace content