Handle PluginProcessHostMsg_ShutdownRequest ChildProcessHost.
Handle PluginProcessHostMsg_ShutdownRequest ChildProcessHost.

BUG=67605
TEST=no crashy

Review URL: http://codereview.chromium.org/6084001

git-svn-id: http://src.chromium.org/svn/trunk/src@69782 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 052c54722cba5a20e774ea4f9487dea221cb903f
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