[BlackBerry] Implement ScrollingCoordinator::frameViewLayoutUpdated()
https://bugs.webkit.org/show_bug.cgi?id=113763

Patch by Carlos Garcia Campos <cgarcia@igalia.com> on 2013-04-02
Reviewed by Rob Buis.

PR 318945
Internally reviewed by Jakob Petsovits.

And remove the BlackBerry specific methods
frameViewFrameRectDidChange and frameViewContentsSizeDidChange.

* page/scrolling/blackberry/ScrollingCoordinatorBlackBerry.cpp:
(WebCore::ScrollingCoordinatorBlackBerry::frameViewLayoutUpdated):
Called when the frame view has been laid out. Update the contents
rectangle and visible area of the scroll layer for the given frame
view.
* page/scrolling/blackberry/ScrollingCoordinatorBlackBerry.h:
(ScrollingCoordinatorBlackBerry):
* platform/graphics/blackberry/LayerWebKitThread.h:
(WebCore::LayerWebKitThread::setFrameVisibleRect): Return early if
value hasn't changed.
(WebCore::LayerWebKitThread::setFrameContentsSize): Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147418 268f45cc-cd09-0410-ab3c-d52691b4dbfc