Revert 244005 "Remove SetHostSize/Bounds from RootWindow in favo..."

> Remove SetHostSize/Bounds from RootWindow in favor of just calling SetBounds() on host()
> 
> R=sky@chromium.org
> http://crbug.com/308846
> 
> Review URL: https://codereview.chromium.org/128753002

TBR=ben@chromium.org

Review URL: https://codereview.chromium.org/133003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244033 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244033