During shutdown delete any pending tasks if running under Heapchecker.
During shutdown delete any pending tasks if running under Heapchecker.

BUG=50345
TEST=Suppression no longer gets used.
Review URL: http://codereview.chromium.org/3791006

git-svn-id: http://src.chromium.org/svn/trunk/src@62644 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 11dd79455d976179fcdce8fa57bef367f777a2e3
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