GitLab

Move the extensions 2pt to the right on Mac to match the native Mac
placements.

Bug: 792593
Change-Id: I579520a37043667dfa289b110287c034447c3812
Reviewed-on: https://chromium-review.googlesource.com/982353Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Sarah Chan <spqchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546536}