Updating trunk VERSION from 643.0 to 644.0
Updating trunk VERSION from 643.0 to 644.0

git-svn-id: http://src.chromium.org/svn/trunk/src@71775 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 896b09ac380267e3f7c593c76d41ff2dd83d3e16
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