chromeos: converts PanelLayoutManager to aura::Window

ash/wm/workspace/workspace_layout_manager.cc

 // Copyright (c) 2012 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/wm/workspace/workspace_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/keyboard/keyboard_observer_register.h"
 #include "ash/public/cpp/shell_window_ids.h"
@@ skipping 197 matching lines @@
     UpdateShelfVisibility();
   }
 }
 
 void WorkspaceLayoutManager::OnWindowPropertyChanged(aura::Window* window,
                                                      const void* key,
                                                      intptr_t old) {
   if (key == aura::client::kAlwaysOnTopKey) {
     if (window->GetProperty(aura::client::kAlwaysOnTopKey)) {
       aura::Window* container =
-          root_window_controller_->always_on_top_controller()
-              ->GetContainer(WmWindow::Get(window))
-              ->aura_window();
+          root_window_controller_->always_on_top_controller()->GetContainer(
+              window);
       if (window->parent() != container)
         container->AddChild(window);
     }
   } else if (key == aura::client::kHasBackdrop) {
     backdrop_controller_->UpdateBackdrop();
   }
 }
 
 void WorkspaceLayoutManager::OnWindowStackingChanged(aura::Window* window) {
   UpdateShelfVisibility();
@@ skipping 168 matching lines @@
   for (aura::Window* window : windows) {
     wm::WindowState* window_state = wm::GetWindowState(window);
     if (window_on_top)
       window_state->DisableAlwaysOnTop(window_on_top);
     else
       window_state->RestoreAlwaysOnTop();
   }
 }
 
 }  // namespace ash