The exact positioning is still in flux -- Pete indicated that he was rethinking where to position the bar, so please check with him.

Gauthier, lets do the same amount of toolbar overlap as the menus do. As for the horizontal positioning ... per offline discussion this morning, lets pin it to the trailing screen's edge and offset it by the same amount as the overflow menu.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/59dcdf12a0c35bab1b1a76bf2eb36af14d6d7270

commit 59dcdf12a0c35bab1b1a76bf2eb36af14d6d7270
Author: Gauthier Ambard <gambard@chromium.org>
Date: Fri Jul 13 13:44:37 2018

[iOS] Adjust FindBar position for UI Refresh

This CL changes the position of the FindBar to follow the design of
UI Refresh.

Bug:  805508 
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I5938fa23fac401f65d1324f06f73087388f66a80
Reviewed-on: https://chromium-review.googlesource.com/1134767
Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574899}
[modify] https://crrev.com/59dcdf12a0c35bab1b1a76bf2eb36af14d6d7270/ios/chrome/browser/ui/browser_view_controller.mm
[modify] https://crrev.com/59dcdf12a0c35bab1b1a76bf2eb36af14d6d7270/ios/chrome/browser/ui/find_bar/BUILD.gn
[modify] https://crrev.com/59dcdf12a0c35bab1b1a76bf2eb36af14d6d7270/ios/chrome/browser/ui/find_bar/find_bar_controller_ios.mm
[modify] https://crrev.com/59dcdf12a0c35bab1b1a76bf2eb36af14d6d7270/ios/chrome/browser/ui/find_bar/find_bar_view.mm