Merge 138902

Merge 138902
> MediaControls::show() should make controls opaque
> https://bugs.webkit.org/show_bug.cgi?id=106034
> 
> Patch by Min Qin <qinmin@chromium.org>; on 2013-01-05
> Reviewed by Eric Carlson.
> 
> Source/WebCore:
> 
> When a video enters fullscreen, webkit starts a timer to make the control transparent when the timer expires.
> If the user exits fullscreen while the timer expires, webkit will call mediaControls::show().
> However, show() actually displays nothing as the control is transparent.
> The user had to move his mouse outside the video rect and move it back in order to show the controls.
> Simply clicking/moving the mouse inside the video rect will not make the control opaque.
> Test: media/video-controls-visible-exiting-fullscreen.html
> 
> * html/shadow/MediaControls.cpp:
> (WebCore::MediaControls::show):
> 
> LayoutTests:
> 
> Add tests to check that video controls are shown when exiting from fullscreen.
> 
> * media/video-controls-visible-exiting-fullscreen-expected.txt: Added.
> * media/video-controls-visible-exiting-fullscreen.html: Added.

TBR=commit-queue@webkit.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=139576