Make Chrome default after importing from current default browser.
Make Chrome default after importing from current default browser.

BUG=11094

Review URL: http://codereview.chromium.org/99136


git-svn-id: http://src.chromium.org/svn/trunk/src@14762 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 1cc7b2b34032b8c5b021ef07156501f9bcbc3128
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