Replace more ObserverList with base::ObserverList.

components/translate/content/browser/content_translate_driver.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 COMPONENTS_TRANSLATE_CONTENT_BROWSER_CONTENT_TRANSLATE_DRIVER_H_
 #define COMPONENTS_TRANSLATE_CONTENT_BROWSER_CONTENT_TRANSLATE_DRIVER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
@@ skipping 91 matching lines @@
   void OnPageTranslated(const std::string& original_lang,
                         const std::string& translated_lang,
                         TranslateErrors::Type error_type);
 
  private:
   // The navigation controller of the tab we are associated with.
   content::NavigationController* navigation_controller_;
 
   TranslateManager* translate_manager_;
 
-  ObserverList<Observer, true> observer_list_;
+  base::ObserverList<Observer, true> observer_list_;
 
   // Max number of attempts before checking if a page has been reloaded.
   int max_reload_check_attempts_;
 
   base::WeakPtrFactory<ContentTranslateDriver> weak_pointer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentTranslateDriver);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CONTENT_BROWSER_CONTENT_TRANSLATE_DRIVER_H_