2011-05-26 Jon Lee <jonlee@apple.com>

2011-05-26  Jon Lee  <jonlee@apple.com>

        Reviewed by Darin Adler.

        REGRESSION (5.0.5-Jazz): Transition to full screen video animates in wrong location when scrolled (61559)
        https://bugs.webkit.org/show_bug.cgi?id=61559
        <rdar://problem/9496054>

        The CALayer that gets animated has a position that is offset by the scroll position of the web view. To
        fix this, we set the destination location based on the rect of the full screen, and add a position
        animation which keeps the position of the layer centered. This prevents glitches if others
        are trying to change the layer position while the animation is running.

        * WebProcess/FullScreen/mac/WebFullScreenManagerMac.h: Refactor the calculation of the CALayer windowed
        position into a private helper function, as well as the animation setup.
        * WebProcess/FullScreen/mac/WebFullScreenManagerMac.mm:
        (WebKit::WebFullScreenManagerMac::beginEnterFullScreenAnimation):
        (WebKit::WebFullScreenManagerMac::beginExitFullScreenAnimation):
        (WebKit::WebFullScreenManagerMac::animateFullScreen): Sets up the zoom animation, and the position offset
        animation.
        (WebKit::WebFullScreenManagerMac::windowedCGTransform): Calculates the placement of the windowed layer
        in screen coordinates.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@87456 268f45cc-cd09-0410-ab3c-d52691b4dbfc