Replace more ObserverList with base::ObserverList.

extensions/browser/guest_view/web_view/web_view_guest.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_
 
 #include <vector>
 
 #include "base/observer_list.h"
@@ skipping 335 matching lines @@
   bool HandleKeyboardShortcuts(const content::NativeWebKeyboardEvent& event);
 
   void ApplyAttributes(const base::DictionaryValue& params);
 
   // Identifies the set of rules registries belonging to this guest.
   int rules_registry_id_;
 
   // Handles find requests and replies for the webview find API.
   WebViewFindHelper find_helper_;
 
-  ObserverList<ScriptExecutionObserver> script_observers_;
+  base::ObserverList<ScriptExecutionObserver> script_observers_;
   scoped_ptr<ScriptExecutor> script_executor_;
 
   content::NotificationRegistrar notification_registrar_;
 
   // True if the user agent is overridden.
   bool is_overriding_user_agent_;
 
   // Stores the window name of the main frame of the guest.
   std::string name_;
 
@@ skipping 39 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<WebViewGuest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_