Speculative fix for throbber showing on all tabs for linux.
Speculative fix for throbber showing on all tabs for linux.

BUG=69528
TEST=none

Review URL: http://codereview.chromium.org/6603030

git-svn-id: http://src.chromium.org/svn/trunk/src@76923 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 718bfc3212dbe208ddbd793f2328234e4085d8ea
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