Removes aura::Window::set_user_data()

ui/aura/window.h

 // Copyright (c) 2012 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 UI_AURA_WINDOW_H_
 #define UI_AURA_WINDOW_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 117 matching lines @@
   // the Window is contained in a hierarchy that does not have a dispatcher at
   // its root.
   Window* GetRootWindow();
   const Window* GetRootWindow() const;
 
   WindowTreeHost* GetHost();
   const WindowTreeHost* GetHost() const;
   void set_host(WindowTreeHost* host) { host_ = host; }
   bool IsRootWindow() const { return !!host_; }
 
-  // The Window does not own this object.
-  void set_user_data(void* user_data) { user_data_ = user_data; }
-  void* user_data() const { return user_data_; }
-
   // Changes the visibility of the window.
   void Show();
   void Hide();
   // Returns true if this window and all its ancestors are visible.
   bool IsVisible() const;
   // Returns the visibility requested by this window. IsVisible() takes into
   // account the visibility of the layer and ancestors, where as this tracks
   // whether Show() without a Hide() has been invoked.
   bool TargetVisibility() const { return visible_; }
 
@@ skipping 348 matching lines @@
   bool visible_;
 
   int id_;
 
   // Whether layer is initialized as non-opaque.
   bool transparent_;
 
   std::unique_ptr<LayoutManager> layout_manager_;
   std::unique_ptr<ui::EventTargeter> targeter_;
 
-  void* user_data_;
-
   // Makes the window pass all events through to any windows behind it.
   bool ignore_events_;
 
   // See set_hit_test_bounds_override_inner().
   gfx::Insets hit_test_bounds_override_inner_;
 
   base::ObserverList<WindowObserver, true> observers_;
 
   // Value struct to keep the name and deallocator for this property.
   // Key cannot be used for this purpose because it can be char* or
   // WindowProperty<>.
   struct Value {
     const char* name;
     int64_t value;
     PropertyDeallocator deallocator;
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_