Revert 157989 "implement TouchController and move touch-specific..."

Causing use-after-fress on ClusterFuzz.

> implement TouchController and move touch-specific methods out of DOMWindow and Document
> 
> BUG=
> 
> Review URL: https://chromiumcodereview.appspot.com/23691037

TBR=pilgrim@chromium.org

Review URL: https://codereview.chromium.org/24613005

git-svn-id: svn://svn.chromium.org/blink/trunk@158335 bbb929c8-8fbe-4397-9dbb-9b2b20218538