Moving SwitchOutputDevice out of OutputDevice interface, eliminating OutputDevice

content/renderer/media/audio_device_factory.cc

Index: content/renderer/media/audio_device_factory.cc
diff --git a/content/renderer/media/audio_device_factory.cc b/content/renderer/media/audio_device_factory.cc
index e2118fea834f453690dbf80d7c0c1394b53eb861..ea4b3abb79a5cc284b5ff6b156ca6f772f31660c 100644
--- a/content/renderer/media/audio_device_factory.cc
+++ b/content/renderer/media/audio_device_factory.cc
@@ -21,6 +21,18 @@ AudioDeviceFactory* AudioDeviceFactory::factory_ = NULL;
 
 namespace {
 
+media::AudioOutputDevice* NewOutputDevice(int render_frame_id,
+                                          int session_id,
+                                          const std::string& device_id,
+                                          const url::Origin& security_origin) {
+  AudioMessageFilter* const filter = AudioMessageFilter::Get();
+  media::AudioOutputDevice* device = new media::AudioOutputDevice(
+      filter->CreateAudioOutputIPC(render_frame_id), filter->io_task_runner(),
+      session_id, device_id, security_origin);
+  device->RequestDeviceAuthorization();
+  return device;
+}
+
 // This is where we decide which audio will go to mixers and which one to
 // AudioOutpuDevice directly.
 bool IsMixable(AudioDeviceFactory::SourceType source_type) {
@@ -32,7 +44,7 @@ bool IsMixable(AudioDeviceFactory::SourceType source_type) {
   return false;
 }
 
-scoped_refptr<media::RestartableAudioRendererSink> NewMixableSink(
+scoped_refptr<media::SwitchableAudioRendererSink> NewMixableSink(
     int render_frame_id,
     const std::string& device_id,
     const url::Origin& security_origin) {
@@ -47,31 +59,27 @@ scoped_refptr<media::AudioRendererSink> NewUnmixableSink(
     int session_id,
     const std::string& device_id,
     const url::Origin& security_origin) {
-  return AudioDeviceFactory::NewOutputDevice(render_frame_id, session_id,
-                                             device_id, security_origin);
+  return NewOutputDevice(render_frame_id, session_id, device_id,
+                         security_origin);
 }
 
 }  // namespace
 
-// static
-scoped_refptr<media::AudioOutputDevice> AudioDeviceFactory::NewOutputDevice(
+scoped_refptr<media::AudioRendererSink>
+AudioDeviceFactory::NewAudioRendererMixerSink(
     int render_frame_id,
     int session_id,
     const std::string& device_id,
     const url::Origin& security_origin) {
   if (factory_) {
-    media::AudioOutputDevice* const device = factory_->CreateOutputDevice(
-        render_frame_id, session_id, device_id, security_origin);
-    if (device)
-      return device;
+    media::AudioRendererSink* const sink =
+        factory_->CreateAudioRendererMixerSink(render_frame_id, session_id,
+                                               device_id, security_origin);
+    if (sink)
+      return sink;
   }
-
-  AudioMessageFilter* const filter = AudioMessageFilter::Get();
-  scoped_refptr<media::AudioOutputDevice> device = new media::AudioOutputDevice(
-      filter->CreateAudioOutputIPC(render_frame_id), filter->io_task_runner(),
-      session_id, device_id, security_origin);
-  device->RequestDeviceAuthorization();
-  return device;
+  return NewOutputDevice(render_frame_id, session_id, device_id,
+                         security_origin);
 }
 
 // static
@@ -96,20 +104,20 @@ AudioDeviceFactory::NewAudioRendererSink(SourceType source_type,
 }
 
 // static
-scoped_refptr<media::RestartableAudioRendererSink>
-AudioDeviceFactory::NewRestartableAudioRendererSink(
+scoped_refptr<media::SwitchableAudioRendererSink>
+AudioDeviceFactory::NewSwitchableAudioRendererSink(
     SourceType source_type,
     int render_frame_id,
     int session_id,
     const std::string& device_id,
     const url::Origin& security_origin) {
   if (factory_) {
-    media::RestartableAudioRendererSink* const device =
-        factory_->CreateRestartableAudioRendererSink(
-            source_type, render_frame_id, session_id, device_id,
-            security_origin);
-    if (device)
-      return device;
+    media::SwitchableAudioRendererSink* const sink =
+        factory_->CreateSwitchableAudioRendererSink(source_type,
+                                                    render_frame_id, session_id,
+                                                    device_id, security_origin);
+    if (sink)
+      return sink;
   }
 
   if (IsMixable(source_type))