GitLab

Update an extension's position when it moves past the midway point between extensions.

Bug: 1008538
Change-Id: I302bc0f4b50bb37999ce5c164a171ccd2eeeee39
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1863509Reviewed-by: Peter Boström <pbos@chromium.org>
Commit-Queue: Caroline Rising <corising@chromium.org>
Cr-Commit-Position: refs/heads/master@{#706163}