Can you add some details about the bug here please.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/75afeccdcb089f3acc6b344e8bb173f4a48f8b23

commit 75afeccdcb089f3acc6b344e8bb173f4a48f8b23
Author: Mitsuru Oshima <oshima@chromium.org>
Date: Fri Aug 18 08:12:43 2017

Do not synthesize mouse move event if the mouse isn't visible

BUG=b:62044128
BUG= 755263 
TEST=covered by unit tests.


Change-Id: Ifa4640abb1df4dbbbe437befdaef81d1d2b15a5f
Reviewed-on: https://chromium-review.googlesource.com/612720
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#495503}
[modify] https://crrev.com/75afeccdcb089f3acc6b344e8bb173f4a48f8b23/ui/aura/window_event_dispatcher.cc
[modify] https://crrev.com/75afeccdcb089f3acc6b344e8bb173f4a48f8b23/ui/aura/window_event_dispatcher_unittest.cc

It can trigger hover effect while using touch (thus no cursor).

b/62044128 is another type of issue

CTS issue has been fixed by another CL, so I won't merge this back to 61.
kinaba@, please let me know if I should.

Right, CTS fix should cover the most urgent case.