Add run time checks to get more info for bug 3931.
Add run time checks to get more info for bug 3931.

The idea is just crash a little earlier and hopefully
see if we can detect memory corruption as the cause of
the actual bug.


Review URL: http://codereview.chromium.org/11583

git-svn-id: http://src.chromium.org/svn/trunk/src@5877 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 4dca7e1ea5fca89514ddaae4b6e4b9e5434f11c3
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