extensions: make the slidey animation fast
extensions: make the slidey animation fast

Personal crusade.

Review URL: http://codereview.chromium.org/344003

git-svn-id: http://src.chromium.org/svn/trunk/src@30265 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 953db88db7e266d0721cf17c1b2026ad40faa5a5
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