Renames WmWindowUserData and converts to using aura

ash/shell.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/shell.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 
@@ skipping 288 matching lines @@
   for (auto& observer : shell_observers_)
     observer.OnAppTerminating();
 }
 
 void Shell::OnLockStateChanged(bool locked) {
   for (auto& observer : shell_observers_)
     observer.OnLockStateChanged(locked);
 #ifndef NDEBUG
   // Make sure that there is no system modal in Lock layer when unlocked.
   if (!locked) {
-    std::vector<WmWindow*> containers = wm::GetContainersFromAllRootWindows(
-        kShellWindowId_LockSystemModalContainer,
-        WmWindow::Get(GetPrimaryRootWindow()));
-    for (WmWindow* container : containers)
-      DCHECK(container->GetChildren().empty());
+    aura::Window::Windows containers = wm::GetContainersFromAllRootWindows(
+        kShellWindowId_LockSystemModalContainer, GetPrimaryRootWindow());
+    for (aura::Window* container : containers)
+      DCHECK(container->children().empty());
   }
 #endif
 }
 
 void Shell::OnCastingSessionStartedOrStopped(bool started) {
   for (auto& observer : shell_observers_)
     observer.OnCastingSessionStartedOrStopped(started);
 }
 
 void Shell::OnRootWindowAdded(WmWindow* root_window) {
@@ skipping 702 matching lines @@
 void Shell::OnWindowActivated(
     aura::client::ActivationChangeObserver::ActivationReason reason,
     aura::Window* gained_active,
     aura::Window* lost_active) {
   WmWindow* gained_active_wm = WmWindow::Get(gained_active);
   if (gained_active_wm)
     root_window_for_new_windows_ = gained_active_wm->GetRootWindow();
 }
 
 }  // namespace ash