Fix extension canceling; the CFUserNotification functionality gets a bit weird.
Fix extension canceling; the CFUserNotification functionality gets a bit weird.

BUG=http://crbug.com/23405
TEST=try to cancel extension load; it should work.

Review URL: http://codereview.chromium.org/279006

git-svn-id: http://src.chromium.org/svn/trunk/src@29046 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 9b866804a317715560a600259bb2fc1c9c0ad434
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