Tear down the notifications UI manager before the profile goes away.
Tear down the notifications UI manager before the profile goes away.

BUG=53912
TEST=close chrome with a notification open


Review URL: http://codereview.chromium.org/3481001

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@60019 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