GitLab

OnImplicitAnimationsCompleted is called from BeginMainFrame, so it
should not call RemoveNotification directly, as it may result in
LayerTreeHost to be deleted mid frame.

TEST=manual
BUG=895883

Change-Id: Icb9d266bcc42bafd9773e7829fd48bb0c2fdd596
Reviewed-on: https://chromium-review.googlesource.com/c/1326041Reviewed-by: James Cook <jamescook@chromium.org>
Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607130}