When compositor is enabled, do not do backing store updates. BUG=52517 TEST=enable compositor and resize the window; there should be no continuous redraws
When compositor is enabled, do not do backing store updates.
BUG=52517
TEST=enable compositor and resize the window; there should be no continuous redraws

Review URL: http://codereview.chromium.org/3204004

git-svn-id: http://src.chromium.org/svn/trunk/src@57359 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5a4ff563cd15feb454187c0f7be35c6cf9139706
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