Advertise that chrome/mac can open webm, oga, ogv, ogg files.
Advertise that chrome/mac can open webm, oga, ogv, ogg files.

I'm not adding webp yet because that's not enabled yet. abarth will ping me once it's on (soon).

BUG=60376
TEST=See bug

Review URL: http://codereview.chromium.org/3996008

git-svn-id: http://src.chromium.org/svn/trunk/src@63608 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 9955e1a6f2e5fc963a671a9142a89f52d95c97b5
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