remove createTouch

Removes document.createTouch and related tests

createTouchList has relatively high UseCount(around 0.015%), see
https://www.chromestatus.com/metrics/feature/timeline/popularity/2368
We need to address these use cases before remove it.

Postpone createTouchList removal to M69


intent to deprecate and Remove:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/GLbUpUUnQzc

PR to touch-events spec:
https://github.com/w3c/touch-events/pull/96

Bug: 518868
Change-Id: If086b51b775e4be59320c4a1329988787ff6f870
Reviewed-on: https://chromium-review.googlesource.com/1041128
Commit-Queue: Ella Ge <eirage@chromium.org>
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Reviewed-by: David Bokan <bokan@chromium.org>
Reviewed-by: Bo <boliu@chromium.org>
Reviewed-by: Rick Byers <rbyers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557907}
19 files changed