commit 5be06c0804fa5cbf2a87de870a84a711c0d82baa
author Ria Jiang <riajiang@chromium.org> Wed Sep 13 15:22:25 2017
committer Commit Bot <commit-bot@chromium.org> Wed Sep 13 15:22:25 2017
tree c1683a7b1e2e55d577dbff4aff553aca50b7bc3e
parent a2dc3e7214f2d70c23ece4dd908b48e33bed15a0

Drop the event when the target window has been deleted.

In the viz-hit-test case, when we cannot find the target window in
EventTargeter, we were using NOTREACHED before this CL. But there are
cases where the target window has simply been deleted by the time this
event is processed, e.g. clicking the settings button inside system
tray's network page, mouse move events after that but before the system
tray goes away would fail. In these cases, it makes sense to just drop
the event like we did in non-viz hit-test. Kept the TODO to investigate
if it can be a security fault when no target window is found.

Also fixes a memory exception in HTQ when using the transform directly.

Bug: 752380
Change-Id: Ifa099c88a98d623b8be363fe3a77b7bc8eea4a54
Reviewed-on: https://chromium-review.googlesource.com/651564
Commit-Queue: Ria Jiang <riajiang@chromium.org>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501636}