Fixes DCHECK that would get hit if webdb couldn't be opened. The DCHECK that would hit is WebDataService::CancelRequest because ~PersonalDataManager would attempt to cancel a request that completed (PersonalDataManager::OnWebDataServiceRequestDone was invoked, but result was NULL).
Fixes DCHECK that would get hit if webdb couldn't be opened. The
DCHECK that would hit is WebDataService::CancelRequest because
~PersonalDataManager would attempt to cancel a request that completed
(PersonalDataManager::OnWebDataServiceRequestDone was invoked, but
result was NULL).

BUG=none
TEST=none
R=dhollowa@chromium.org

Review URL: http://codereview.chromium.org/6839029

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@81595 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