Unreviewed, rolling out r95482.

Unreviewed, rolling out r95482.
http://trac.webkit.org/changeset/95482
https://bugs.webkit.org/show_bug.cgi?id=68410

Broke chromium webkit-tests (Requested by dslomov on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2011-09-19

Source/WebCore:

* platform/image-encoders/skia/JPEGImageEncoder.cpp:
(WebCore::RGBAtoRGB):

LayoutTests:

* fast/canvas/webgl/premultiplyalpha-test-expected.txt:
* fast/canvas/webgl/premultiplyalpha-test.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95494 268f45cc-cd09-0410-ab3c-d52691b4dbfc