The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3504586e6d1da7f6eb01c303dfeb207061de00f8

commit 3504586e6d1da7f6eb01c303dfeb207061de00f8
Author: Matthew Jones <mdjones@chromium.org>
Date: Thu Jun 21 18:30:33 2018

Handle interaction between Contextual Search and bottom toolbar

The contextual search manager is passed into the bottom toolbar's
init function allowing us to attach an observer to it. This allows
us to show and hide the bottom toolbar's android view which was
previously obscuring contextual search.

Bug:  854230 
Change-Id: Ieefbc233bacfb90d31f0110ed3f96957b10f069a
Reviewed-on: https://chromium-review.googlesource.com/1106552
Commit-Queue: Matthew Jones <mdjones@chromium.org>
Reviewed-by: Ted Choc <tedchoc@chromium.org>
Reviewed-by: Pedro Amaral <amaralp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569329}
[modify] https://crrev.com/3504586e6d1da7f6eb01c303dfeb207061de00f8/chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarCoordinator.java
[modify] https://crrev.com/3504586e6d1da7f6eb01c303dfeb207061de00f8/chrome/android/java/src/org/chromium/chrome/browser/toolbar/BottomToolbarMediator.java
[modify] https://crrev.com/3504586e6d1da7f6eb01c303dfeb207061de00f8/chrome/android/java/src/org/chromium/chrome/browser/toolbar/ToolbarManager.java