Remove more non-aura windows code.

BUG=BUG=330735
R=scottmg@chromium.org, sky@chromium.org

Review URL: https://codereview.chromium.org/137993009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@244831 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 244831