Revert 236017 "Move some non-event related functionality from Ro..."

> Move some non-event related functionality from RootWindow onto RootWindowHost.
> 
> - Transform logic
> - Compositor
> 
> R=sky@chromium.org
> http://crbug.com/308843
> 
> Review URL: https://codereview.chromium.org/70103020

TBR=ben@chromium.org

Review URL: https://codereview.chromium.org/77233002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@236094 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 236094