Refactor AudioRendererMixer to be more generic.

media/base/audio_renderer_mixer_input.cc

Index: media/base/audio_renderer_mixer_input.cc
diff --git a/media/base/audio_renderer_mixer_input.cc b/media/base/audio_renderer_mixer_input.cc
index 2c476f0109c55805de8714a0e614a16fdc9815f3..d52774b5cc6e37559fe69cd1cc54bb90a8f74643 100644
--- a/media/base/audio_renderer_mixer_input.cc
+++ b/media/base/audio_renderer_mixer_input.cc
@@ -4,6 +4,7 @@
 
 #include "media/base/audio_renderer_mixer_input.h"
 
+#include "base/bind.h"
 #include "base/logging.h"
 #include "media/base/audio_renderer_mixer.h"
 
@@ -18,7 +19,8 @@ AudioRendererMixerInput::AudioRendererMixerInput(
       remove_mixer_cb_(remove_mixer_cb),
       mixer_(NULL),
       callback_(NULL),
-      current_audio_delay_milliseconds_(0) {
+      error_cb_(base::Bind(
+          &AudioRendererMixerInput::OnRenderError, base::Unretained(this))) {
 }
 
 AudioRendererMixerInput::~AudioRendererMixerInput() {
@@ -58,7 +60,7 @@ void AudioRendererMixerInput::Play() {
   if (playing_)
     return;
 
-  mixer_->AddMixerInput(this);
+  mixer_->AddMixerInput(this, error_cb_);
   playing_ = true;
 }
 
@@ -80,8 +82,7 @@ bool AudioRendererMixerInput::SetVolume(double volume) {
 double AudioRendererMixerInput::ProvideInput(AudioBus* audio_bus,
                                              base::TimeDelta buffer_delay) {
   int frames_filled = callback_->Render(
-      audio_bus,
-      current_audio_delay_milliseconds_ + buffer_delay.InMilliseconds());
+      audio_bus, buffer_delay.InMillisecondsF() + 0.5);

[no longer working on chromium, 2013/04/30 08:42:23]

nit, this might trigger compiling warning, explicitly cast it to int ?

 
   // AudioConverter expects unfilled frames to be zeroed.
   if (frames_filled < audio_bus->frames()) {