Fixes crash on showing info bubble.
Fixes crash on showing info bubble.

BUG=8854
TEST=see bug

Review URL: http://codereview.chromium.org/42302

git-svn-id: http://src.chromium.org/svn/trunk/src@11924 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: d33c964a132c4c6dd9978449f57f44aa4db67555
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