https://bugs.webkit.org/show_bug.cgi?id=66814

Source/WebCore:

WebViewImpl::didRecreateGraphicsContext() was calling
setRootLayer() on the CC layer tree, but the root layer
doesn't actually change and the code wasn't defensive
against this. This CL adds some asserts to catch tree
corruption and removes the unnecessary calls.

Patch by Iain Merrick <husky@google.com> on 2011-08-23
Reviewed by James Robinson.

* platform/graphics/GraphicsLayer.cpp:
(WebCore::GraphicsLayer::setParent):
* platform/graphics/GraphicsLayer.h:
* platform/graphics/chromium/LayerChromium.cpp:
(WebCore::LayerChromium::setParent):
(WebCore::LayerChromium::hasAncestor):
* platform/graphics/chromium/LayerChromium.h:

Source/WebKit/chromium:

WebViewImpl::didRecreateGraphicsContext() was calling
setRootLayer() on the CC layer tree, but the root layer
doesn't actually change and the code wasn't defensive
against this. This CL adds some asserts to catch tree
corruption and removes the unnecessary calls.

Patch by Iain Merrick <husky@google.com> on 2011-08-23
Reviewed by James Robinson.

* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::didRecreateGraphicsContext):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@93679 268f45cc-cd09-0410-ab3c-d52691b4dbfc