Fix a bug where clicking an external link from an extension page would reuse the same process.
Fix a bug where clicking an external link from an extension page would reuse
the same process.

BUG=13997
Review URL: http://codereview.chromium.org/126067

git-svn-id: http://src.chromium.org/svn/trunk/src@18451 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: f7af493860f39a89c455a1726b7ec137c89d6f95
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