Unreviewed, rolling out r100693.

Unreviewed, rolling out r100693.
http://trac.webkit.org/changeset/100693
https://bugs.webkit.org/show_bug.cgi?id=72779

This patch caused a rendering regression (see bug 72770)
(Requested by philip__ on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2011-11-18

Source/WebCore:

* rendering/RenderObject.cpp:
(WebCore::RenderObject::setStyle):
* rendering/style/RenderStyle.cpp:
(WebCore::RenderStyle::diff):

LayoutTests:

* fast/layers/layer-absolute-parent-opacity-expected.png: Removed.
* fast/layers/layer-absolute-parent-opacity-expected.txt: Removed.
* fast/layers/layer-absolute-parent-opacity.html: Removed.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@100832 268f45cc-cd09-0410-ab3c-d52691b4dbfc