Unreviewed, rolling out r106376.

Unreviewed, rolling out r106376.
http://trac.webkit.org/changeset/106376
https://bugs.webkit.org/show_bug.cgi?id=77481

Broke WebGLLayerChromiumTest in webkit_unit_tests (Requested
by kbr_google on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2012-01-31

Source/WebCore:

* platform/graphics/gpu/DrawingBuffer.cpp:
(WebCore):
(WebCore::DrawingBuffer::reset):

LayoutTests:

* platform/chromium/test_expectations.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@106400 268f45cc-cd09-0410-ab3c-d52691b4dbfc