Some linked_ptr -> unique_ptr conversion in extensions/browser.

extensions/browser/event_listener_map.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 EXTENSIONS_BROWSER_EVENT_LISTENER_MAP_H_
 #define EXTENSIONS_BROWSER_EVENT_LISTENER_MAP_H_
 
 #include <map>
 #include <memory>
 #include <set>
@@ skipping 88 matching lines @@
   std::unique_ptr<base::DictionaryValue> filter_;
   EventFilter::MatcherID matcher_id_;  // -1 if unset.
 
   DISALLOW_COPY_AND_ASSIGN(EventListener);
 };
 
 // Holds listeners for extension events and can answer questions about which
 // listeners are interested in what events.
 class EventListenerMap {
  public:
-  typedef std::vector<linked_ptr<EventListener> > ListenerList;
+  using ListenerList = std::vector<std::unique_ptr<EventListener>>;
 
   class Delegate {
    public:
     virtual ~Delegate() {}
     virtual void OnListenerAdded(const EventListener* listener) = 0;
     virtual void OnListenerRemoved(const EventListener* listener) = 0;
   };
 
   explicit EventListenerMap(Delegate* delegate);
   ~EventListenerMap();
@@ skipping 70 matching lines @@
   std::map<EventFilter::MatcherID, EventListener*> listeners_by_matcher_id_;
 
   EventFilter event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(EventListenerMap);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EVENT_LISTENER_MAP_H_