GitLab

Bug: b:112331332
Test: manually test on device, minimizes chrome windows but not
Test: assistant window.
Change-Id: I6d1cd8badabee351536d886271dd26b4f02be94b
Reviewed-on: https://chromium-review.googlesource.com/1171254Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Weidong Guo <weidongg@chromium.org>
Commit-Queue: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582831}