The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb

commit ea4ca940a5939c6f389b37594f8eb0b9ad0673fb
Author: sky <sky@chromium.org>
Date: Mon Sep 12 21:56:19 2016

Ports SystemModalContainerLayoutManager to ash/common

BUG= 644860 
TEST=covered by tests
R=jamescook@chromium.org

Review-Url: https://codereview.chromium.org/2336653002
Cr-Commit-Position: refs/heads/master@{#418068}

[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/BUILD.gn
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/aura/wm_window_aura.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm/container_finder.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm/container_finder.h
[add] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm/system_modal_container_layout_manager.cc
[add] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm/system_modal_container_layout_manager.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm_root_window_controller.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm_root_window_controller.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm_shell.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm_shell.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/common/wm_window_property.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/display/screen_position_controller.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/mus/bridge/wm_window_mus.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/root_window_controller.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/root_window_controller.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/root_window_controller_unittest.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/shell.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/shell.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/wm/ash_focus_rules.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/wm/screen_dimmer.cc
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/wm/screen_dimmer.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/wm/screen_pinning_controller.cc
[delete] https://crrev.com/37fe7f5ad68ac9e5111f150e2c593b9ffebe2be6/ash/wm/system_modal_container_layout_manager.cc
[delete] https://crrev.com/37fe7f5ad68ac9e5111f150e2c593b9ffebe2be6/ash/wm/system_modal_container_layout_manager.h
[modify] https://crrev.com/ea4ca940a5939c6f389b37594f8eb0b9ad0673fb/ash/wm/system_modal_container_layout_manager_unittest.cc

Because of migrating to aura mash now uses SystemModalContainerLayoutManager.