GitLab

Also moved the rootwindow stuff to the hwnd_util and cleaned it up.

BUG=118641
TEST=see bug
Review URL: https://chromiumcodereview.appspot.com/10270029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@134848 0039d316-1c4b-4281-b951-d872f2087c98