Fix disabling of accelerated overflow scroll.

This setting isn't being respected in render_view_impl.cc.

R=hartmanng@chromium.org
TBR=jamesr@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/27171003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228675 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228675