Replace more ObserverList with base::ObserverList.

ui/wm/core/cursor_manager.h

 // Copyright (c) 2013 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_WM_CORE_CURSOR_MANAGER_H_
 #define UI_WM_CORE_CURSOR_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 62 matching lines @@
   // Number of times LockCursor() has been invoked without a corresponding
   // UnlockCursor().
   int cursor_lock_count_;
 
   // The current state of the cursor.
   scoped_ptr<internal::CursorState> current_state_;
 
   // The cursor state to restore when the cursor is unlocked.
   scoped_ptr<internal::CursorState> state_on_unlock_;
 
-  ObserverList<aura::client::CursorClientObserver> observers_;
+  base::ObserverList<aura::client::CursorClientObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(CursorManager);
 };
 
 }  // namespace wm
 
 #endif  // UI_WM_CORE_CURSOR_MANAGER_H_