GitLab

changes:
(1) Since |tablet_controller_| is created OnAccelerometerUpdate, itself
is enough to represent ShouldHandlePowerButtonEvents().
(2) Remove IsTabletModeSupported() in PowerButtonDisplayController. It
is used on stylus removed. Nowadays, stylus is configured on convertible
only. Even for clamshell device with stylus, SetDisplayForcedOff(false)
should be OK since it will be a no-op because of early return.

TEST=covered by tests

Bug: none
Change-Id: I0dd883d9bf97e1c24c1b9acd5e1856b630f97fec
Reviewed-on: https://chromium-review.googlesource.com/702919Reviewed-by: Dan Erat <derat@chromium.org>
Commit-Queue: Qiang(Joe) Xu <warx@chromium.org>
Cr-Commit-Position: refs/heads/master@{#506942}