GitLab

Bug: 901402
Test: manual. The window title fades in after overview
  animation ends (in clamshell, tablet, from home launcher).
  and hides immediately when exiting.

Change-Id: I06b25ebea428439ec6e7ab2751db74409971855f
Reviewed-on: https://chromium-review.googlesource.com/c/1316363
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605578}