Promotes WmWindowMus functions to WmWindowAura and nukes WmWindowMus

ash/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_AURA_WM_WINDOW_AURA_H_
 #define ASH_AURA_WM_WINDOW_AURA_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/wm_window.h"
 #include "base/macros.h"
@@ skipping 10 matching lines @@
 class ASH_EXPORT WmWindowAura : public WmWindow,
                                 public aura::WindowObserver,
                                 public ::wm::TransientWindowObserver {
  public:
   // NOTE: this class is owned by the corresponding window. You shouldn't delete
   // TODO(sky): friend deleter and make private.
   ~WmWindowAura() override;
 
   // Returns a WmWindow for an aura::Window, creating if necessary. |window| may
   // be null, in which case null is returned.
-  static WmWindow* Get(aura::Window* window) {
-    return const_cast<WmWindow*>(Get(const_cast<const aura::Window*>(window)));
+  static WmWindowAura* Get(aura::Window* window) {
+    return const_cast<WmWindowAura*>(
+        Get(const_cast<const aura::Window*>(window)));
   }
-  static const WmWindow* Get(const aura::Window* window);
+  static const WmWindowAura* Get(const aura::Window* window);
 
   static std::vector<WmWindow*> FromAuraWindows(
       const std::vector<aura::Window*>& aura_windows);
   static std::vector<aura::Window*> ToAuraWindows(
       const std::vector<WmWindow*>& windows);
 
   static aura::Window* GetAuraWindow(WmWindow* wm_window) {
     return const_cast<aura::Window*>(
         GetAuraWindow(const_cast<const WmWindow*>(wm_window)));
   }
   static const aura::Window* GetAuraWindow(const WmWindow* wm_window);
 
   aura::Window* aura_window() { return window_; }
   const aura::Window* aura_window() const { return window_; }
 
   // See description of |children_use_extended_hit_region_|.
   bool ShouldUseExtendedHitRegion() const;
 
+  wm::WindowState* GetWindowState() { return WmWindow::GetWindowState(); }
+
   // WmWindow:
   void Destroy() override;
   const WmWindow* GetRootWindow() const override;
   RootWindowController* GetRootWindowController() override;
   WmShell* GetShell() const override;
   void SetName(const char* name) override;
   std::string GetName() const override;
   void SetTitle(const base::string16& title) override;
   base::string16 GetTitle() const override;
   void SetShellWindowId(int id) override;
@@ skipping 178 matching lines @@
 
   // If true the minimum size is 0x0, default is minimum size comes from widget.
   bool use_empty_minimum_size_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(WmWindowAura);
 };
 
 }  // namespace ash
 
 #endif  // ASH_AURA_WM_WINDOW_AURA_H_