Composited layer that painted into composited ancestor is not repainted after moving

Composited layer that painted into composited ancestor is not repainted after moving
https://bugs.webkit.org/show_bug.cgi?id=114655

Patch by Hurnjoo Lee <hurnjoo.lee@samsung.com> on 2013-10-08
Reviewed by Simon Fraser.

Source/WebCore:

Test: compositing/repaint/absolute-painted-into-composited-ancestor.html

Composited layers are currently skipping repainting after layout,
if the repaint status is not NeedsFullRepaint. However, in case layers
were painted into composited ancestor, they need to repaint.

* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::shouldRepaintAfterLayout):

LayoutTests:

Add a text repaint test to check the repainting of composited layer
that painted into composited ancestor.

* compositing/repaint/absolute-painted-into-composited-ancestor-expected.txt: Added.
* compositing/repaint/absolute-painted-into-composited-ancestor.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@157108 268f45cc-cd09-0410-ab3c-d52691b4dbfc