GTK test shell valgrind, try 3. Null out the main window before initiating shutdown.
GTK test shell valgrind, try 3. Null out the main window before initiating shutdown.

Review URL: http://codereview.chromium.org/159307

git-svn-id: http://src.chromium.org/svn/trunk/src@21486 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 0aa0ec2d0a204972499894d5587a8f027ab01bce
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