Remove old touch-event based support for active/hover states.

BUG=315972
TEST=fast/events/touch/gesture/gesture-tap-active-state.html

Review URL: https://codereview.chromium.org/70723002

git-svn-id: svn://svn.chromium.org/blink/trunk@161855 bbb929c8-8fbe-4397-9dbb-9b2b20218538