Revert 203427 "Hook up the device selection to the WebAudio live..."

Possibly caused content_browsertests to fail on Mac.

> 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.
> 
> 
> 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://chromiumcodereview.appspot.com/15721002

TBR=xians@chromium.org
Review URL: https://codereview.chromium.org/15725013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203434 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 8 insertions, 6 deletions

diff --git a/content/renderer/media/webrtc_audio_device_impl.h b/content/renderer/media/webrtc_audio_device_impl.h
index 960d0d0..e740a59 100644
--- a/content/renderer/media/webrtc_audio_device_impl.h
+++ b/content/renderer/media/webrtc_audio_device_impl.h
@@ -24,11 +24,13 @@
 // webrtc::AudioDeviceModule which makes it possible for a user (e.g. webrtc::
 // VoiceEngine) to register this class as an external AudioDeviceModule (ADM).
 // Then WebRtcAudioDeviceImpl::SetSessionId() needs to be called to set the
-// session id that tells which device to use. The user can then call
-// WebRtcAudioDeviceImpl::StartPlayout() and
-// WebRtcAudioDeviceImpl::StartRecording() from the render process to initiate
-// and start audio rendering and capturing in the browser process. IPC is
-// utilized to set up the media streams.
+// session id that tells which device to use. The user can either get the
+// session id from the MediaStream or use a value of 1 (AudioInputDeviceManager
+// ::kFakeOpenSessionId), the later will open the default device without going
+// through the MediaStream. The user can then call WebRtcAudioDeviceImpl::
+// StartPlayout() and WebRtcAudioDeviceImpl::StartRecording() from the render
+// process to initiate and start audio rendering and capturing in the browser
+// process. IPC is utilized to set up the media streams.
 //
 // Usage example:
 //
@@ -37,7 +39,7 @@
 //   {
 //      scoped_refptr<WebRtcAudioDeviceImpl> external_adm;
 //      external_adm = new WebRtcAudioDeviceImpl();
-//      external_adm->SetSessionId(session_id);
+//      external_adm->SetSessionId(1);
 //      VoiceEngine* voe = VoiceEngine::Create();
 //      VoEBase* base = VoEBase::GetInterface(voe);
 //      base->Init(external_adm);