Adding owner access from WebMediaStreamTrack::ExtraData

Adding owner access from WebMediaStreamTrack::ExtraData
Like WebMediaStreamSource having access to the owner of the ExtraData
object simplifies the chromium code significantly.
Also taking the opportunity to clean up the ExtraData code in
MediaStreamSource after the last of the non-standard code added for
WebAudio has been refactored away.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=165054

[abarth-chromium, 2014-01-10 15:41:18]

lgtm

https://codereview.chromium.org/133733004/diff/1/Source/platform/mediastream/...
File Source/platform/mediastream/MediaStreamSource.h (right):

https://codereview.chromium.org/133733004/diff/1/Source/platform/mediastream/...
Source/platform/mediastream/MediaStreamSource.h:108: RefPtr<ExtraData>
m_extraData;
I don't understand why this need to be ref counted.  What other object holds a
reference to this object?

[Tommy Widenflycht, 2014-01-13 13:08:39]

https://codereview.chromium.org/133733004/diff/1/Source/platform/mediastream/...
File Source/platform/mediastream/MediaStreamSource.h (right):

https://codereview.chromium.org/133733004/diff/1/Source/platform/mediastream/...
Source/platform/mediastream/MediaStreamSource.h:108: RefPtr<ExtraData>
m_extraData;
On 2014/01/10 15:41:18, abarth wrote:
> I don't understand why this need to be ref counted.  What other object holds a
> reference to this object?

Doh, neither do I. I was just making sure all of "my" ExtraData code was the
same when all of them should be changed to OwnPtr instead. Will do that in an
follow-up CL instead.

[commit-bot: I haz the power, 2014-01-14 09:13:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tommyw@chromium.org/133733004/110001

[commit-bot: I haz the power, 2014-01-14 10:37:45]

Change committed as 165054