Replace more ObserverList with base::ObserverList.

content/browser/web_contents/web_contents_impl.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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 997 matching lines @@
   typedef std::map<int, RenderWidgetHostView*> PendingWidgetViews;
   PendingWidgetViews pending_widget_views_;
 
   typedef std::map<WebContentsImpl*, DestructionObserver*> DestructionObservers;
   DestructionObservers destruction_observers_;
 
   // A list of observers notified when page state changes. Weak references.
   // This MUST be listed above frame_tree_ since at destruction time the
   // latter might cause RenderViewHost's destructor to call us and we might use
   // the observer list then.
-  ObserverList<WebContentsObserver> observers_;
+  base::ObserverList<WebContentsObserver> observers_;
 
   // The tab that opened this tab, if any.  Will be set to null if the opener
   // is closed.
   WebContentsImpl* opener_;
 
   // True if this tab was opened by another tab. This is not unset if the opener
   // is closed.
   bool created_with_opener_;
 
 #if defined(OS_WIN)
@@ skipping 255 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendZone);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_