The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7c6764df884c25019cdbf07610b77184ddfed75b

commit 7c6764df884c25019cdbf07610b77184ddfed75b
Author: Gauthier Ambard <gambard@chromium.org>
Date: Wed Feb 21 16:26:12 2018

Trigger expanded/contracted state on rotation

When the omnibox is focused, the expanded/contracted state of the
toolbar is triggered based on the size class of the application.
The rotations while the omnibox is focused need to trigger the changes
of state.

Bug:  808416 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I554a772b8f38fd6347a126fc44a21ac1aff1ca54
Reviewed-on: https://chromium-review.googlesource.com/926106
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538127}
[modify] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/orchestrator/omnibox_focus_orchestrator.h
[modify] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/orchestrator/omnibox_focus_orchestrator.mm
[modify] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/toolbar/adaptive/BUILD.gn
[modify] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_coordinator.mm
[modify] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller.h
[modify] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller.mm
[add] https://crrev.com/7c6764df884c25019cdbf07610b77184ddfed75b/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller_delegate.h

The NextAction date has arrived: 2018-02-28