The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a

commit 596b8f7faebbe68afa649dc7b3819a70d3a7ea6a
Author: Gauthier Ambard <gambard@chromium.org>
Date: Thu Jan 25 14:02:12 2018

Fade out the controls during fullscreen

This CL fades out the primary toolbar controls during fullscreen
progress. It doesn't change the location bar as it needs a special
treatment.

Bug:  804730 
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ibaf8982f41c9b2e0841de6359db4f95436d39330
Reviewed-on: https://chromium-review.googlesource.com/883524
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Louis Romero <lpromero@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531887}
[modify] https://crrev.com/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a/ios/chrome/browser/ui/toolbar/adaptive/BUILD.gn
[modify] https://crrev.com/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_coordinator.mm
[modify] https://crrev.com/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view.h
[modify] https://crrev.com/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view.mm
[modify] https://crrev.com/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller.h
[modify] https://crrev.com/596b8f7faebbe68afa649dc7b3819a70d3a7ea6a/ios/chrome/browser/ui/toolbar/adaptive/primary_toolbar_view_controller.mm