Add support for the audio-output-device switching IPC mechanism to the renderer lower layers (media…

media/base/fake_audio_renderer_sink.cc

 // 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.
 
 #include "media/base/fake_audio_renderer_sink.h"
 
+#include "base/bind.h"
+#include "base/location.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
 
 namespace media {
 
 FakeAudioRendererSink::FakeAudioRendererSink()
     : state_(kUninitialized),
       callback_(NULL) {
 }
 
 FakeAudioRendererSink::~FakeAudioRendererSink() {
   DCHECK(!callback_);
@@ skipping 27 matching lines @@
 void FakeAudioRendererSink::Play() {
   DCHECK(state_ == kStarted || state_ == kPaused) << "state_ " << state_;
   DCHECK_EQ(state_, kPaused);
   ChangeState(kPlaying);
 }
 
 bool FakeAudioRendererSink::SetVolume(double volume) {
   return true;
 }
 
+void FakeAudioRendererSink::SwitchOutputDevice(
+    const std::string& device_id,
+    const GURL& security_origin,
+    const SwitchOutputDeviceCB& callback) {
+  callback.Run(SWITCH_OUTPUT_DEVICE_RESULT_SUCCESS);
+}
+
 bool FakeAudioRendererSink::Render(AudioBus* dest, int audio_delay_milliseconds,
                                    int* frames_written) {
   if (state_ != kPlaying)
     return false;
 
   *frames_written = callback_->Render(dest, audio_delay_milliseconds);
   return true;
 }
 
 void FakeAudioRendererSink::OnRenderError() {
@@ skipping 12 matching lines @@
     "kPlaying",
     "kStopped"
   };
 
   DVLOG(1) << __FUNCTION__ << " : "
            << kStateNames[state_] << " -> " << kStateNames[new_state];
   state_ = new_state;
 }
 
 }  // namespace media