mash: Move ShelfWindowWatcher[ItemDelegate] to ash/common.

ash/common/wm_window.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_COMMON_WM_WINDOW_H_
 #define ASH_COMMON_WM_WINDOW_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 106 matching lines @@
   virtual gfx::Transform GetTargetTransform() const = 0;
 
   virtual bool IsSystemModal() const = 0;
 
   virtual bool GetBoolProperty(WmWindowProperty key) = 0;
   virtual int GetIntProperty(WmWindowProperty key) = 0;
   virtual void SetIntProperty(WmWindowProperty key, int value) = 0;
 
   // Returns null if there are no details.
   virtual ShelfItemDetails* GetShelfItemDetails() = 0;
+  virtual void SetShelfItemDetails(const ShelfItemDetails& details) = 0;
+  virtual void ClearShelfItemDetails() = 0;
 
   wm::WindowState* GetWindowState() {
     return const_cast<wm::WindowState*>(
         const_cast<const WmWindow*>(this)->GetWindowState());
   }
   virtual const wm::WindowState* GetWindowState() const = 0;
 
   // The implementation of this matches aura::Window::GetToplevelWindow().
   virtual WmWindow* GetToplevelWindow() = 0;
   // The implementation of this matches
@@ skipping 159 matching lines @@
   virtual void AddLimitedPreTargetHandler(ui::EventHandler* handler) = 0;
   virtual void RemoveLimitedPreTargetHandler(ui::EventHandler* handler) = 0;
 
  protected:
   virtual ~WmWindow() {}
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WM_WINDOW_H_