The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/28527342321e416b8805e728dbbfa62d1c445b1c

commit 28527342321e416b8805e728dbbfa62d1c445b1c
Author: moshayedi <moshayedi@chromium.org>
Date: Thu Mar 30 21:55:57 2017

Add window cycle completion and cancellation accelerators in mus+ash.

Adds two accelerators to complete or cancel window cycle. Note that this
is just a temporary solution until we have proper solution for window
cycle event handling.

BUG= 629191 

Review-Url: https://codereview.chromium.org/2783613003
Cr-Commit-Position: refs/heads/master@{#460900}

[modify] https://crrev.com/28527342321e416b8805e728dbbfa62d1c445b1c/ash/mus/accelerators/accelerator_controller_registrar.cc
[modify] https://crrev.com/28527342321e416b8805e728dbbfa62d1c445b1c/ash/mus/accelerators/accelerator_controller_registrar.h
[modify] https://crrev.com/28527342321e416b8805e728dbbfa62d1c445b1c/services/ui/ws/event_dispatcher.cc
[modify] https://crrev.com/28527342321e416b8805e728dbbfa62d1c445b1c/ui/base/accelerators/accelerator.cc
[modify] https://crrev.com/28527342321e416b8805e728dbbfa62d1c445b1c/ui/base/accelerators/accelerator.h

This now works that ash is running the window service.