[mus+ash] removes WmWindow, wm_window.h and wm_window.cc

ash/aura/shell_port_classic.h

 // 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.
 
 #ifndef ASH_AURA_SHELL_PORT_CLASSIC_H_
 #define ASH_AURA_SHELL_PORT_CLASSIC_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 36 matching lines @@
   void SetDisplayWorkAreaInsets(aura::Window* window,
                                 const gfx::Insets& insets) override;
   std::unique_ptr<display::TouchTransformSetter> CreateTouchTransformDelegate()
       override;
   void LockCursor() override;
   void UnlockCursor() override;
   void ShowCursor() override;
   void HideCursor() override;
   void SetGlobalOverrideCursor(base::Optional<ui::CursorData> cursor) override;
   bool IsMouseEventsEnabled() override;
-  std::vector<WmWindow*> GetAllRootWindows() override;
+  std::vector<aura::Window*> GetAllRootWindows() override;
   void RecordGestureAction(GestureActionType action) override;
   void RecordUserMetricsAction(UserMetricsAction action) override;
   void RecordTaskSwitchMetric(TaskSwitchSource source) override;
   std::unique_ptr<WindowResizer> CreateDragWindowResizer(
       std::unique_ptr<WindowResizer> next_window_resizer,
       wm::WindowState* window_state) override;
   std::unique_ptr<WindowCycleEventFilter> CreateWindowCycleEventFilter()
       override;
   std::unique_ptr<wm::MaximizeModeEventHandler> CreateMaximizeModeEventHandler()
       override;
@@ skipping 37 matching lines @@
 
   std::unique_ptr<AcceleratorControllerDelegateAura>
       accelerator_controller_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellPortClassic);
 };
 
 }  // namespace ash
 
 #endif  // ASH_AURA_SHELL_PORT_CLASSIC_H_