Mark a flaky layout test which has been timing out on some runs.
Mark a flaky layout test which has been timing out on some runs.

BUG=13767
TBR=tony

Review URL: http://codereview.chromium.org/125098

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@18350 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