DevTools: bring css with hidden dock toggle back.
DevTools: bring css with hidden dock toggle back.

Review URL: http://codereview.chromium.org/150161

git-svn-id: http://src.chromium.org/svn/trunk/src@19721 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 6a019f5e3f31e5374200a691dd6157f7a7d64fa5
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