Pepper: leak the plugin registry
Pepper: leak the plugin registry

Leaking this is better than poking into bad memory on shutdown.

BUG=63234

Review URL: http://codereview.chromium.org/5556002

git-svn-id: http://src.chromium.org/svn/trunk/src@68045 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 7bc3d35f49b66feb67e7198de9917bd6ab27a28d
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