Linux layout test fix
Linux layout test fix

Append doesn't mutate so take the result of it.

TBR=evan

Review URL: http://codereview.chromium.org/11493


git-svn-id: http://src.chromium.org/svn/trunk/src@5711 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 8b7f9e526aa48e20ecf5054486c13c4014629c0e
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