Use a NotificationRegistrar to listen for notifications.
Use a NotificationRegistrar to listen for notifications.

BUG=2381
Review URL: http://codereview.chromium.org/115668

git-svn-id: http://src.chromium.org/svn/trunk/src@16715 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 34f12cb921b4373ad05ce28361e2c795ff03934f
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