GitLab

Modify the function CanHandleToggleCapsLock: pressing any
redundant key will prevent triggering the Capslock shortcut.

In original code, pressing Alt + M + Search then releasing Alt
will trigger CapsLock. Because AcceleratorHistory will receive
Alt + Search when Search is pressed. The fact that key M is pr-
-essed is ignored.

R=afakhry@chromium.org

Bug: 789283
Test: ash unittests
Change-Id: Id359d11cda4562a0b90da97af6c3dde3faf33c53
Reviewed-on: https://chromium-review.googlesource.com/1199853
Commit-Queue: Andrew Xu <andrewxu@chromium.org>
Reviewed-by: Ahmed Fakhry <afakhry@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589702}