Move AudioRenderer out of Filter heirarchy.

media/filters/audio_renderer_impl.cc

Index: media/filters/audio_renderer_impl.cc
diff --git a/media/filters/audio_renderer_impl.cc b/media/filters/audio_renderer_impl.cc
index c8841cdc339793ad06ea545b205fdb65f9dedb8a..cf957ec596a253b16012849b332906c84b85e5cb 100644
--- a/media/filters/audio_renderer_impl.cc
+++ b/media/filters/audio_renderer_impl.cc
@@ -33,7 +33,7 @@ AudioRendererImpl::AudioRendererImpl(media::AudioRendererSink* sink)
                           base::Unretained(this))) {
 }
 
-void AudioRendererImpl::SetHost(FilterHost* host) {
+void AudioRendererImpl::SetHost(AudioRendererHost* host) {
   DCHECK(host);
   DCHECK(!host_);
   host_ = host;
@@ -424,7 +424,7 @@ uint32 AudioRendererImpl::FillBuffer(uint8* dest,
     if (!algorithm_->CanFillBuffer() && received_end_of_stream_ &&
         !rendered_end_of_stream_ && base::Time::Now() >= earliest_end_time_) {
       rendered_end_of_stream_ = true;
-      host_->NotifyEnded();
+      host_->AudioRendererEnded();
     } else if (!algorithm_->CanFillBuffer() && !received_end_of_stream_ &&
                state_ == kPlaying && !underflow_disabled_) {
       state_ = kUnderflow;
@@ -507,7 +507,7 @@ base::TimeDelta AudioRendererImpl::ConvertToDuration(int bytes) {
 }
 
 void AudioRendererImpl::OnRenderError() {
-  host_->DisableAudioRenderer();
+  host_->AudioRendererDisabled();
 }
 
 void AudioRendererImpl::DisableUnderflowForTesting() {