Converts MruWindowTracker to work with common types

ash/accelerators/accelerator_commands.cc

 // Copyright 2013 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/accelerators/accelerator_commands.h"
 
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
+#include "ash/common/wm_window.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/display_util.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/wm/mru_window_tracker.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm/window_util.h"
 #include "base/metrics/user_metrics.h"
 
 namespace ash {
 namespace accelerators {
 
 bool ToggleMinimized() {
   aura::Window* window = wm::GetActiveWindow();
   // Attempt to restore the window that would be cycled through next from
   // the launcher when there is no active window.
   if (!window) {
     MruWindowTracker::WindowList mru_windows(
         Shell::GetInstance()->mru_window_tracker()->BuildMruWindowList());
     if (!mru_windows.empty())
-      wm::GetWindowState(mru_windows.front())->Activate();
+      mru_windows.front()->GetWindowState()->Activate();
     return true;
   }
   wm::WindowState* window_state = wm::GetWindowState(window);
   if (!window_state->CanMinimize())
     return false;
   window_state->Minimize();
   return true;
 }
 
 void ToggleMaximized() {
@@ skipping 61 matching lines @@
         std::find_if(modes.begin(), modes.end(),
                      [](const DisplayMode& mode) { return mode.native; });
     display_manager->SetDisplayMode(DisplayManager::kUnifiedDisplayId, *iter);
   } else {
     SetDisplayUIScale(display_manager->GetDisplayIdForUIScaling(), 1.0f);
   }
 }
 
 }  // namespace accelerators
 }  // namespace ash