GitLab

With the ability to select multiple holding space items at a time, we
want to be able to open, pin, and unpin items in bulk.

Bug: 1129981
Change-Id: Ifa0f80de5f3a30c87678858d66c697b8852381a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2426085
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810083}