Makes Panel related classes use ash/wm/common types

ash/wm/aura/wm_window_aura.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_WM_AURA_WM_WINDOW_AURA_H_
 #define ASH_WM_AURA_WM_WINDOW_AURA_H_
 
 #include "ash/wm/common/wm_window.h"
 #include "base/macros.h"
 #include "base/observer_list.h"
@@ skipping 43 matching lines @@
                                   const gfx::Point& point) const override;
   gfx::Point ConvertPointToScreen(const gfx::Point& point) const override;
   gfx::Point ConvertPointFromScreen(const gfx::Point& point) const override;
   gfx::Rect ConvertRectToScreen(const gfx::Rect& rect) const override;
   gfx::Rect ConvertRectFromScreen(const gfx::Rect& rect) const override;
   gfx::Size GetMinimumSize() const override;
   gfx::Size GetMaximumSize() const override;
   bool GetTargetVisibility() const override;
   bool IsVisible() const override;
   bool GetBoolProperty(WmWindowProperty key) override;
+  int GetIntProperty(WmWindowProperty key) override;
   const WindowState* GetWindowState() const override;
   WmWindow* GetToplevelWindow() override;
   void SetParentUsingContext(WmWindow* context,
                              const gfx::Rect& screen_bounds) override;
   void AddChild(WmWindow* window) override;
   WmWindow* GetParent() override;
   const WmWindow* GetTransientParent() const override;
   std::vector<WmWindow*> GetTransientChildren() override;
   void SetLayoutManager(
       std::unique_ptr<WmLayoutManager> layout_manager) override;
@@ skipping 66 matching lines @@
 
   base::ObserverList<WmWindowObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(WmWindowAura);
 };
 
 }  // namespace wm
 }  // namespace ash
 
 #endif  // ASH_WM_AURA_WM_WINDOW_AURA_H_