I think we can punt these to a later phase. See  Issue 730958 .

https://chromium-review.googlesource.com/c/556112/

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d4c0b8ab59d72e7414652ddac075c88d033d66d2

commit d4c0b8ab59d72e7414652ddac075c88d033d66d2
Author: Elly Fong-Jones <ellyjones@chromium.org>
Date: Fri Jun 30 21:58:58 2017

[macviews] wire the import lock dialog

The import lock dialog is shown during profile import if firefox is running.

BUG= 728155 

Change-Id: I4937ab02a7660d7e02482a42d113b7b52df33cb3
Reviewed-on: https://chromium-review.googlesource.com/556112
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#483837}
[modify] https://crrev.com/d4c0b8ab59d72e7414652ddac075c88d033d66d2/chrome/browser/ui/BUILD.gn
[modify] https://crrev.com/d4c0b8ab59d72e7414652ddac075c88d033d66d2/chrome/browser/ui/cocoa/browser_dialogs_views_mac.cc
[modify] https://crrev.com/d4c0b8ab59d72e7414652ddac075c88d033d66d2/chrome/browser/ui/cocoa/browser_dialogs_views_mac.h
[modify] https://crrev.com/d4c0b8ab59d72e7414652ddac075c88d033d66d2/chrome/browser/ui/cocoa/importer/import_lock_dialog_cocoa.mm
[modify] https://crrev.com/d4c0b8ab59d72e7414652ddac075c88d033d66d2/chrome/browser/ui/views/importer/import_lock_dialog_view.cc