Some easy linked_ptr removal from extensions/common/

extensions/common/event_filter.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 EXTENSIONS_COMMON_EVENT_FILTER_H_
 #define EXTENSIONS_COMMON_EVENT_FILTER_H_
 
 #include <map>
+#include <memory>
 #include <set>
 
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "components/url_matcher/url_matcher.h"
 #include "extensions/common/event_filtering_info.h"
 #include "extensions/common/event_matcher.h"
 
 namespace extensions {
 
 // Matches incoming events against a collection of EventMatchers. Each added
 // EventMatcher is given an id which is returned by MatchEvent() when it is
 // passed a matching event.
 class EventFilter {
@@ skipping 58 matching lines @@
    private:
     std::unique_ptr<EventMatcher> event_matcher_;
     // The id sets in url_matcher_ that this EventMatcher owns.
     std::vector<url_matcher::URLMatcherConditionSet::ID> condition_set_ids_;
     url_matcher::URLMatcher* url_matcher_;
 
     DISALLOW_COPY_AND_ASSIGN(EventMatcherEntry);
   };
 
   // Maps from a matcher id to an event matcher entry.
-  typedef std::map<MatcherID, linked_ptr<EventMatcherEntry> > EventMatcherMap;
+  using EventMatcherMap =
+      std::map<MatcherID, std::unique_ptr<EventMatcherEntry>>;
 
   // Maps from event name to the map of matchers that are registered for it.
-  typedef std::map<std::string, EventMatcherMap> EventMatcherMultiMap;
+  using EventMatcherMultiMap = std::map<std::string, EventMatcherMap>;
 
   // Adds the list of URL filters in |matcher| to the URL matcher, having
   // matches for those URLs map to |id|.
   bool CreateConditionSets(
       MatcherID id,
       EventMatcher* matcher,
       url_matcher::URLMatcherConditionSet::Vector* condition_sets);
 
   bool AddDictionaryAsConditionSet(
       base::DictionaryValue* url_filter,
@@ skipping 16 matching lines @@
 
   // Maps from event matcher ids to the name of the event they match on.
   std::map<MatcherID, std::string> id_to_event_name_;
 
   DISALLOW_COPY_AND_ASSIGN(EventFilter);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_EVENT_FILTER_H_