Some easy linked_ptr removal from extensions/common/

extensions/common/message_bundle.cc

 // 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.
 
 #include "extensions/common/message_bundle.h"
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/i18n/rtl.h"
 #include "base/lazy_instance.h"
-#include "base/memory/linked_ptr.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "extensions/common/error_utils.h"
 #include "extensions/common/extension_l10n_util.h"
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
@@ skipping 312 matching lines @@
     return &(it->second);
 
   return NULL;
 }
 
 void EraseL10nMessagesMap(const std::string& extension_id) {
   g_extension_to_messages_map.Get().messages_map.erase(extension_id);
 }
 
 }  // namespace extensions