The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9113fd733bbb3edccf819018ab2ead58c4a0797f

commit 9113fd733bbb3edccf819018ab2ead58c4a0797f
Author: Gauthier Ambard <gambard@chromium.org>
Date: Mon Jun 04 16:21:42 2018

Update the appearance of the Search Button

This CL changes the appearance of the Search Button, making it
pill-shaped and changing its spotlight appearance to only show the
pill shape instead of the rounded rectangle.

Bug: 847884,  847869 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I450dd769bfdc67d4252884d7a2f13f2d553e2e45
Reviewed-on: https://chromium-review.googlesource.com/1080812
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Olivier Robin <olivierrobin@chromium.org>
Reviewed-by: Olivier Robin <olivierrobin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564114}
[modify] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/BUILD.gn
[modify] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_button.h
[modify] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_button.mm
[modify] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_button_factory.mm
[modify] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_constants.h
[modify] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_constants.mm
[add] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_search_button.h
[add] https://crrev.com/9113fd733bbb3edccf819018ab2ead58c4a0797f/ios/chrome/browser/ui/toolbar/buttons/toolbar_search_button.mm

The NextAction date has arrived: 2018-06-06