The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3fde26c7b89a5eadeee41e6e5b5b5252863ca864

commit 3fde26c7b89a5eadeee41e6e5b5b5252863ca864
Author: Sammie Quon <sammiequon@google.com>
Date: Mon Oct 30 19:57:30 2017

splitview: Remove ToggleOverview at the end of some splitview tests.

This was needed previously at the end of some tests otherwise there will
be a memory leak. The introduction of SplitViewTestWindowDelegate makes
this not needed anymore.

Test: ash_unittests SplitView* with asan and without
Bug:  766725 
Change-Id: I4e9754f541719fa23250ee7f691d345f5e58bdc5
Reviewed-on: https://chromium-review.googlesource.com/744291
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512587}
[modify] https://crrev.com/3fde26c7b89a5eadeee41e6e5b5b5252863ca864/ash/wm/overview/window_selector_unittest.cc
[modify] https://crrev.com/3fde26c7b89a5eadeee41e6e5b5b5252863ca864/ash/wm/splitview/split_view_controller_unittest.cc