Replace more ObserverList with base::ObserverList.

media/base/user_input_monitor.h

 // Copyright 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 MEDIA_BASE_USER_INPUT_MONITOR_H_
 #define MEDIA_BASE_USER_INPUT_MONITOR_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list_threadsafe.h"
@@ skipping 15 matching lines @@
  public:
   // The interface to receive mouse movement events.
   class MEDIA_EXPORT MouseEventListener {
    public:
     // |position| is the new mouse position.
     virtual void OnMouseMoved(const SkIPoint& position) = 0;
 
    protected:
     virtual ~MouseEventListener() {}
   };
-  typedef ObserverListThreadSafe<UserInputMonitor::MouseEventListener>
+  typedef base::ObserverListThreadSafe<UserInputMonitor::MouseEventListener>
       MouseListenerList;
 
   UserInputMonitor();
   virtual ~UserInputMonitor();
 
   // Creates a platform-specific instance of UserInputMonitor.
   // |io_task_runner| is the task runner for an IO thread.
   // |ui_task_runner| is the task runner for a UI thread.
   static scoped_ptr<UserInputMonitor> Create(
       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner,
@@ skipping 33 matching lines @@
   size_t key_press_counter_references_;
   size_t mouse_listeners_count_;
   scoped_refptr<MouseListenerList> mouse_listeners_;
 
   DISALLOW_COPY_AND_ASSIGN(UserInputMonitor);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_USER_INPUT_MONITOR_H_