Some easy linked_ptr removal from extensions/common/

extensions/common/message_bundle.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_COMMON_MESSAGE_BUNDLE_H_
 #define EXTENSIONS_COMMON_MESSAGE_BUNDLE_H_
 
 #include <stddef.h>
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
-#include "base/memory/linked_ptr.h"
-
 namespace base {
 class DictionaryValue;
 class Value;
 }
 
 namespace extensions {
 
 // Contains localized extension messages for one locale. Any messages that the
 // locale does not provide are pulled from the default locale.
 class MessageBundle {
  public:
-  typedef std::map<std::string, std::string> SubstitutionMap;
-  typedef std::vector<linked_ptr<base::DictionaryValue> > CatalogVector;
+  using SubstitutionMap = std::map<std::string, std::string>;
+  using CatalogVector = std::vector<std::unique_ptr<base::DictionaryValue>>;
 
   // JSON keys of interest for messages file.
   static const char kContentKey[];
   static const char kMessageKey[];
   static const char kPlaceholdersKey[];
 
   // Begin/end markers for placeholders and messages
   static const char kPlaceholderBegin[];
   static const char kPlaceholderEnd[];
   static const char kMessageBegin[];
@@ skipping 127 matching lines @@
 
 // Returns message map that matches given extension_id, or NULL.
 L10nMessagesMap* GetL10nMessagesMap(const std::string& extension_id);
 
 // Erases the L10nMessagesMap for the given |extension_id|.
 void EraseL10nMessagesMap(const std::string& extension_id);
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_MESSAGE_BUNDLE_H_