Support creation of toplevel mus::Windows on separate displays

ash/mus/bridge/wm_window_mus.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/mus/bridge/wm_window_mus.h"
 
 #include "ash/common/shelf/shelf_item_types.h"
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/window_positioning_utils.h"
 #include "ash/common/wm/window_state.h"
@@ skipping 115 matching lines @@
 }
 
 WmWindowMus::~WmWindowMus() {
   window_->RemoveObserver(this);
 }
 
 // static
 const WmWindowMus* WmWindowMus::Get(const ui::Window* window) {
   if (!window)
     return nullptr;
-

[mfomitchev, 2016/11/17 17:14:01]

Doesn't seem like there's particular reason to remove this line (especially
considering this is the only change to the file).

[thanhph, 2016/11/17 19:08:30]

Done.

   const WmWindowMus* wm_window = window->GetLocalProperty(kWmWindowKey);
   if (wm_window)
     return wm_window;
   // WmWindowMus is owned by the ui::Window.
   // Unfortunately there isn't a good way to avoid the cast here.
   return new WmWindowMus(const_cast<ui::Window*>(window));
 }
 
 // static
 WmWindowMus* WmWindowMus::Get(views::Widget* widget) {
@@ skipping 916 matching lines @@
 }
 
 void WmWindowMus::OnTransientChildRemoved(ui::Window* window,
                                           ui::Window* transient) {
   for (auto& observer : transient_observers_)
     observer.OnTransientChildRemoved(this, Get(transient));
 }
 
 }  // namespace mus
 }  // namespace ash