Mark GPUBrowserTest.BrowserTestCanLaunchWithOSMesa on Windows.
Mark GPUBrowserTest.BrowserTestCanLaunchWithOSMesa on Windows.

On XP (dbg), flakyness rate is 8%.

BUG=72608
TEST=NONE
TBR=apatrick

Review URL: http://codereview.chromium.org/6474004

git-svn-id: http://src.chromium.org/svn/trunk/src@74462 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 15add76b9ae2c48b4fa392159b0721a4c7544725
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser