Temporarily silence fast/images/svg-as-background.html on mac webkit bots.
Temporarily silence fast/images/svg-as-background.html on mac webkit bots.

TBR=nirnimesh
BUG=none
TEST=none

Review URL: http://codereview.chromium.org/4194006

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@64480 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser