The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/db641fd1121b54894645fcbe045d75b63a1ec4b4

commit db641fd1121b54894645fcbe045d75b63a1ec4b4
Author: Gauthier Ambard <gambard@chromium.org>
Date: Mon Jan 29 09:28:59 2018

Add guide for the omnibox popup on AdaptiveToolbar

This CL constrains the OmniboxLayoutGuide so it is positioned on the
omnibox of the adaptive toolbar.

Bug:  806248 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I84a19370868ff152402a6039c626acb28cc6a26c
Reviewed-on: https://chromium-review.googlesource.com/888640
Reviewed-by: Louis Romero <lpromero@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532368}
[modify] https://crrev.com/db641fd1121b54894645fcbe045d75b63a1ec4b4/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller.mm