Moves transient window observer methods out of WindowObserver

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 <map>
 #include <string>
 #include <vector>
@@ skipping 23 matching lines @@
 class Transform;
 class Vector2d;
 }
 
 namespace ui {
 class EventHandler;
 class Layer;
 class Texture;
 }
 
-// TODO(sky): nuke. Temporary while moving transients out of Window.
-namespace views {
-namespace corewm {
-class TransientWindowManager;
-}
-}
 namespace aura {
 
 class LayoutManager;
 class RootWindow;
 class WindowDelegate;
 class WindowObserver;
 
 // TODO(beng): remove once RootWindow is renamed.
 typedef RootWindow WindowEventDispatcher;
 
@@ skipping 302 matching lines @@
   void PrintWindowHierarchy(int depth) const;
 #endif
 
  protected:
   // Deletes (or removes if not owned by parent) all child windows. Intended for
   // use from the destructor.
   void RemoveOrDestroyChildren();
 
  private:
   friend class test::WindowTestApi;
-  // TODO(sky): temporary until TransientWindowManager gets its own observer.
-  friend class views::corewm::TransientWindowManager;
   friend class LayoutManager;
   friend class RootWindow;
   friend class WindowTargeter;
 
   // Called by the public {Set,Get,Clear}Property functions.
   int64 SetPropertyInternal(const void* key,
                             const char* name,
                             PropertyDeallocator deallocator,
                             int64 value,
                             int64 default_value);
@@ skipping 191 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_WINDOW_H_