Fix for the flashing of the front tab. - The background tabs think they are visible causing paints to   be executed. These steal the backing store from the visible tab
Fix for the flashing of the front tab.
- The background tabs think they are visible causing paints to
  be executed. These steal the backing store from the visible tab

Please read the bug for more info.

BUG=20831
TEST= see bug for steps


Review URL: http://codereview.chromium.org/199010

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@25739 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