Make WebAudio output as stereo as default

Source/modules/webaudio/AudioContext.cpp

Index: Source/modules/webaudio/AudioContext.cpp
diff --git a/Source/modules/webaudio/AudioContext.cpp b/Source/modules/webaudio/AudioContext.cpp
index 1fa9d78d1487be98833b4ca9eed55da21e13c2ac..9d6fd96748e493797f6ab58a3aad0a0cff7d88fc 100644
--- a/Source/modules/webaudio/AudioContext.cpp
+++ b/Source/modules/webaudio/AudioContext.cpp
@@ -419,8 +419,7 @@ PassRefPtr<MediaStreamAudioSourceNode> AudioContext::createMediaStreamSource(Med
 PassRefPtr<MediaStreamAudioDestinationNode> AudioContext::createMediaStreamDestination()
 {
     // FIXME: Add support for an optional argument which specifies the number of channels.

[Tommy Widenflycht, 2014/03/25 09:49:27]

I guess this comment can be removed as well

[no longer working on chromium, 2014/03/25 10:08:29]

Done with replacing the FIXME with a comment, as how it is done in other places.

-    // FIXME: The default should probably be stereo instead of mono.
-    return MediaStreamAudioDestinationNode::create(this, 1);
+    return MediaStreamAudioDestinationNode::create(this, 2);

[Tommy Widenflycht, 2014/03/25 09:49:27]

Can this be made into an enum? MediaStreamAudioDestinationNode::Stereo is much
better than 2.

[no longer working on chromium, 2014/03/25 10:08:29]

:) Looking at the whole file, they use 2 for the channel. I suggest we should
keep what it is, and leave it to WebAudio guys to do a thorough clean-up if they
think it is suitable.

 }
 
 PassRefPtr<ScriptProcessorNode> AudioContext::createScriptProcessor(ExceptionState& exceptionState)