Remove the AutoFillManager as an observer of the PersonalDataManager in the constructor.  In rare circumtances, the user can close the browser (and shutdown the AutoFillManager) after we've set ourselves as observers of the PersonalDataManager and before the PersonalDataManager has called us back.
Remove the AutoFillManager as an observer of the PersonalDataManager in the constructor.  In rare circumtances, the user can close the browser (and shutdown the AutoFillManager) after we've set ourselves as observers of the PersonalDataManager and before the PersonalDataManager has called us back.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/579013

git-svn-id: http://src.chromium.org/svn/trunk/src@38284 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: ce354c2af7b6c7d4c396de854dd7bd9423d8c634
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