Introduce AudioHardwareConfig for renderer side audio device info.

content/renderer/media/audio_renderer_mixer_manager.h

Index: content/renderer/media/audio_renderer_mixer_manager.h
diff --git a/content/renderer/media/audio_renderer_mixer_manager.h b/content/renderer/media/audio_renderer_mixer_manager.h
index 20afcb83fd1944b61a709b983fde5da70b9b9a0e..cfa0545153ba240066228abf06c8d0f345624579 100644
--- a/content/renderer/media/audio_renderer_mixer_manager.h
+++ b/content/renderer/media/audio_renderer_mixer_manager.h
@@ -13,6 +13,7 @@
 #include "media/audio/audio_parameters.h"
 
 namespace media {
+class AudioHardwareConfig;
 class AudioRendererMixer;
 class AudioRendererMixerInput;
 class AudioRendererSink;
@@ -36,7 +37,7 @@ namespace content {
 class CONTENT_EXPORT AudioRendererMixerManager {
  public:
   // Construct an instance using the given audio hardware configuration.
-  AudioRendererMixerManager(int hardware_sample_rate, int hardware_buffer_size);
+  AudioRendererMixerManager(media::AudioHardwareConfig* hardware_config);

[scherkus (not reviewing), 2013/01/31 02:33:33]

raw pointer scares me -- care to document the lifetime + ownership situation?

[miu, 2013/01/31 05:28:53]

Drive-by comment: Add 'explicit' keyword here.

[DaleCurtis, 2013/01/31 19:50:00]

Done.

[DaleCurtis, 2013/01/31 19:50:00]

Done.

   ~AudioRendererMixerManager();
 
   // Creates an AudioRendererMixerInput with the proper callbacks necessary to
@@ -82,8 +83,7 @@ class CONTENT_EXPORT AudioRendererMixerManager {
 
   // Audio hardware configuration.  Used to construct output AudioParameters for
   // each AudioRendererMixer instance.
-  int hardware_sample_rate_;
-  int hardware_buffer_size_;
+  media::AudioHardwareConfig* const hardware_config_;
 
   media::AudioRendererSink* sink_for_testing_;