increase threshold setting for culling tests
increase threshold setting for culling tests

git-svn-id: http://src.chromium.org/svn/trunk/src@24815 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 994aa88d3a98a75bc1c00d300b861b56639af72b
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