Add another disk cache performance test.
Add another disk cache performance test.


git-svn-id: http://src.chromium.org/svn/trunk/src@1553 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 2b02ada15834894d6e84a8e9a1d724cf723f54d6
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