https://bugs.webkit.org/show_bug.cgi?id=102043

Patch by Huang Dongsung <luxtella@company100.net> on 2012-11-13
Reviewed by Noam Rosenthal.

.:

Add a test to check that a gif animation can run on a compositing layer.

* ManualTests/animated-gif-on-compositing-layer.html: Added.

Source/WebKit2:

CoordinatedGraphicsLayer::setContentsToImage() checks the pointer to the image,
not nativeImagePtr, so Coordinated Graphics currently draws only the first frame
of gif animations. This patch makes Coordinated Graphics draw gif animations.

In addition, this patch modifies the style of direct image compositing
code to match other parts of CoordinatedGraphicsLayer.

Test: ManualTests/animated-gif-on-compositing-layer.html

* WebProcess/WebPage/CoordinatedGraphics/CoordinatedGraphicsLayer.cpp:
(WebCore::CoordinatedGraphicsLayer::didChangeImageBacking):
(WebCore):
(WebCore::CoordinatedGraphicsLayer::CoordinatedGraphicsLayer):
(WebCore::CoordinatedGraphicsLayer::setContentsNeedsDisplay):
(WebCore::CoordinatedGraphicsLayer::setContentsToImage):
(WebCore::CoordinatedGraphicsLayer::syncImageBacking):
(WebCore::CoordinatedGraphicsLayer::flushCompositingStateForThisLayerOnly):
(WebCore::CoordinatedGraphicsLayer::releaseImageBackingIfNeeded):
(WebCore::CoordinatedGraphicsLayer::purgeBackingStores):
(WebCore::CoordinatedGraphicsLayer::hasPendingVisibleChanges):
* WebProcess/WebPage/CoordinatedGraphics/CoordinatedGraphicsLayer.h:
(CoordinatedGraphicsLayer):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@134376 268f45cc-cd09-0410-ab3c-d52691b4dbfc