commit 421ca8e4574cc143938756844b447e02bcbae0d5
author Alex Newcomer <newcomer@chromium.org> Fri Jan 11 17:15:56 2019
committer Commit Bot <commit-bot@chromium.org> Fri Jan 11 17:15:56 2019
tree 6114f711400cb7926619ce23ae3d73de71d66e40
parent 6c755cc0401e0696f31285f4637b853eed2711f7

cros: Shelf should hide after launcher animation.

The shelf bg used to shift opacity as the launcher animation began,
instead it should wait until the launcher is at shelf height.

This changes two things:
 - Notify observers of target visibility changing when the animation begins.
 - Notify observers of actual visibility changing when the animation ends.

Change-Id: I6e020406bb6fc0daf3430cec38c0abb6fb230a97
Reviewed-on: https://chromium-review.googlesource.com/c/1370368
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Alex Newcomer <newcomer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622041}