GitLab

Opacity fade in when expand view is shown.
0 - 100% opacity 100ms linear curve.

Bug: 1148692
Change-Id: Ib4477a7219e5a9823f476ce98de5caa1e5ce0c99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2557942
Commit-Queue: Melissa Zhang <melzhang@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832590}