GitLab

When deleting holding space item views (such as occurs when unpinning)
the ink drop layers for the view can attempt to be reordered on the
parent which causes a crash. This is most easily reproducible by trying
to unpin the last pinned file in the pinned files section.

Note that the solution reparents ink drop layers to be within the
holding space item view hierarchy which also addresses an issue where
ink drop layers did not animate in/out with the layer for animating
holding space item view.

Bug: 1157280
Change-Id: I4d7daf831e46d3bdd7bf049b49e15b53319cc2c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587519
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836400}