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We are proposing to use SendCommandAndIgnoreResponse to dispatch event
to avoid waiting for the reply of sending events, so that we can
dispatch more than one events in one tick.

In order to control the time to send events we need to use tick
duration for every tick, it can come from pause action or pointermove
action. We have add a default tick duration right now that we will
dispatch events in one tick per frame, but changing the tick duration
in the Action API will control how many ticks in one frame, so that we
can control how often we want to dispatch events.

Bug: 606367
Change-Id: Ib4745d37181de0724fe5e84fa32d893840ace910
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1752338
Commit-Queue: Lan Wei <lanwei@chromium.org>
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Reviewed-by: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#692232}