[mus+ash] Removes WmWindow from ash/wm/mru_window_tracker and overview mode

chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.cc

 // Copyright 2014 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 "chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shelf/wm_shelf.h"
@@ skipping 346 matching lines @@
       break;
     }
     case ANIMATION_STEP_SHOW_NEW_USER: {
       // In order to make the animation look better, we had to move the code
       // that shows the new user to the previous step. Hence, we do nothing
       // here.
       break;
     }
     case ANIMATION_STEP_FINALIZE: {
       // Reactivate the MRU window of the new user.
-      aura::Window::Windows mru_list = ash::WmWindow::ToAuraWindows(
-          ash::Shell::Get()->mru_window_tracker()->BuildMruWindowList());
+      aura::Window::Windows mru_list =
+          ash::Shell::Get()->mru_window_tracker()->BuildMruWindowList();
       if (!mru_list.empty()) {
         aura::Window* window = mru_list[0];
         ash::wm::WindowState* window_state = ash::wm::GetWindowState(window);
         if (owner_->IsWindowOnDesktopOfUser(window, new_account_id_) &&
             !window_state->IsMinimized()) {
           // Several unit tests come here without an activation client.
           aura::client::ActivationClient* client =
               aura::client::GetActivationClient(window->GetRootWindow());
           if (client)
             client->ActivateWindow(window);
@@ skipping 55 matching lines @@
         if (itr != window_to_entry_map.end()) {
           windows_by_account_id_[itr->second->show_for_user()].push_back(
               child_window);
         }
       }
     }
   }
 }
 
 }  // namespace chrome