Revert 203686 "Trying relanding this CL, the original CL passed ..."

> Trying relanding this CL, the original CL passed the try bots but failed the mac 10.7 bot, I am keeping an eye on the bots and will revert it if it fails the bot again.
> 
> Hook up the device selection to the WebAudio live audio.
> WebAudio live audio needs to pass the session_id to the browser process so that Chrome can open the correct input device for unitfied IO.
> 
> This CL looks big because it touches quite some interfaces from the render to the browser. But the change is simple and basically adding a session_id/device_id to the classes. All the changes some together and it is very hard to break it down.
> It also makes the media output code more similar to the media input code as well, and it will be easier to merge them for the future.
> 
> TBR=henrika@chormium.org
> 
> BUG=147327
> TEST=http://chromium.googlecode.com/svn/trunk/samples/audio/visualizer-live.html
> Change the device using the camera icon on the right of the omnibox, then reload. Verify the sound is coming from the correct input device.
> 
> Review URL: https://codereview.chromium.org/15836006

TBR=xians@chromium.org

Review URL: https://codereview.chromium.org/16325002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203690 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 7 insertions, 1 deletions

diff --git a/media/base/audio_renderer_sink.h b/media/base/audio_renderer_sink.h
index b2f4ba0a..0d3c6c7 100644
--- a/media/base/audio_renderer_sink.h
+++ b/media/base/audio_renderer_sink.h
@@ -7,7 +7,6 @@
 
 #include <vector>
 #include "base/basictypes.h"
-#include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/audio_bus.h"
@@ -42,6 +41,13 @@ class AudioRendererSink
 
   // Sets important information about the audio stream format.
   // It must be called before any of the other methods.
+  // For clients wishing to have synchronized input and output,
+  // |params| may specify |input_channels| > 0, representing a
+  // number of input channels which will be at the same sample-rate
+  // and buffer-size as the output as specified in |params|.
+  // In this case, the callback's RenderIO() method will be called instead
+  // of Render(), providing the synchronized input data at the same time as
+  // when new output data is to be rendered.
   virtual void Initialize(const AudioParameters& params,
                           RenderCallback* callback) = 0;