The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8c86ba838fcfac0de766c5448a2dc5a35c28ca18

commit 8c86ba838fcfac0de766c5448a2dc5a35c28ca18
Author: Charlene Yan <cyan@chromium.org>
Date: Wed Aug 08 15:52:05 2018

Center bookmark bar icons.

Simplifying the button padding calculation for the bookmark bar. Checks that it is appropriately centered in attached and detached state as well as with and without an info bar and tab switching.

Bug:  865555 ,  864595 ,  863697 
Change-Id: I4550c65af596d51ca41b7ac3be2c8f14825e304f
Reviewed-on: https://chromium-review.googlesource.com/1155369
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Charlene Yan <cyan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581574}
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/bookmarks/bookmark_bar_view.cc
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/bookmarks/bookmark_bar_view.h
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/browser_view.cc
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/browser_view.h
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/browser_view_layout.cc
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/browser_view_layout.h
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/browser_view_layout_unittest.cc
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/browser_view_unittest.cc
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/contents_layout_manager.cc
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/frame/contents_layout_manager.h
[modify] https://crrev.com/8c86ba838fcfac0de766c5448a2dc5a35c28ca18/chrome/browser/ui/views/toolbar/toolbar_view.cc