Do not use AppLaunchHandler after destruction.
Do not use AppLaunchHandler after destruction.

This prevents browser from crashing.

BUG=chromium-os:12374
TEST=no crashes

Review URL: http://codereview.chromium.org/6650027

git-svn-id: http://src.chromium.org/svn/trunk/src@77615 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 99ad077c7fb667a0cc059c38bc66ea03f454c77f
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