GitLab

Overview exit animation histograms shall include when overview ends
because you drag two windows from overview and snap on opposite sides.

Test: All/SplitViewOverviewSessionInClamshellTest.BothSnappedOverviewExitAnimationHistogramTest/?
Change-Id: I5a1e7d11a4e6d4e3aff49c32e489b9042aa5cf0e
Fixed: 1124786
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2401941Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Avery Musbach <amusbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806377}