Revert 177812 "Migrate touch events to EventHandlerRegistry"

Causing ton of use-after-free crashes on ClusterFuzz.

> Migrate touch events to EventHandlerRegistry
> 
> Remove the specialized code for tracking touch events in favor of the
> generic EventHandlerRegistry. Covered by existing tests.
> 
> See https://codereview.chromium.org/206603002/ for full review history.
> 
> BUG=347366
> TEST=fast/events/touch*
> 
> Review URL: https://codereview.chromium.org/225903009

TBR=skyostil@chromium.org

Review URL: https://codereview.chromium.org/391483002

git-svn-id: svn://svn.chromium.org/blink/trunk@177996 bbb929c8-8fbe-4397-9dbb-9b2b20218538