Unreviewed, rolling out r100438.

Unreviewed, rolling out r100438.
http://trac.webkit.org/changeset/100438
https://bugs.webkit.org/show_bug.cgi?id=72536

Broke unit tests (Requested by jamesr_ on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2011-11-16

Source/WebCore:

* platform/PlatformScreen.h:
* platform/chromium/PlatformScreenChromium.cpp:
* platform/chromium/PlatformSupport.h:
* platform/graphics/chromium/cc/CCLayerTreeHost.h:
(WebCore::CCSettings::CCSettings):
* platform/graphics/chromium/cc/CCThreadProxy.cpp:
(WebCore::CCThreadProxy::initializeImplOnImplThread):

Source/WebKit/chromium:

* public/WebScreenInfo.h:
(WebKit::WebScreenInfo::WebScreenInfo):
* src/PlatformSupport.cpp:
* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::setIsAcceleratedCompositingActive):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@100495 268f45cc-cd09-0410-ab3c-d52691b4dbfc