GitLab

The scroll bubble sticks near the menu bubble until the user
explicitly changes the scroll bubble position. Per UX.

Bug: 978163
Change-Id: Id3064be03c2b9fde84ca0a96a4fd4f50391a6503
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1691781
Commit-Queue: Katie Dektar <katie@chromium.org>
Reviewed-by: Anastasia Helfinstein <anastasi@google.com>
Cr-Commit-Position: refs/heads/master@{#676106}