Disable a ui test on valgrind mac, because it is causing the bot to hang.
Disable a ui test on valgrind mac, because it is causing the bot to hang.

BUG=39057
TEST=tree greener
TBR=dhg

Review URL: http://codereview.chromium.org/2502001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@48760 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