Run clang-modernize -use-nullptr over src/extensions/.

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 <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 44 matching lines @@
       "[A-Z], [0-9] and \"_\" are allowed.",
       name.c_str());
   return false;
 }
 
 // static
 MessageBundle* MessageBundle::Create(const CatalogVector& locale_catalogs,
                                      std::string* error) {
   scoped_ptr<MessageBundle> message_bundle(new MessageBundle);
   if (!message_bundle->Init(locale_catalogs, error))
-    return NULL;
+    return nullptr;
 
   return message_bundle.release();
 }
 
 bool MessageBundle::Init(const CatalogVector& locale_catalogs,
                          std::string* error) {
   dictionary_.clear();
 
   for (CatalogVector::const_reverse_iterator it = locale_catalogs.rbegin();
        it != locale_catalogs.rend(); ++it) {
@@ skipping 255 matching lines @@
 ExtensionToL10nMessagesMap* GetExtensionToL10nMessagesMap() {
   return &g_extension_to_messages_map.Get().messages_map;
 }
 
 L10nMessagesMap* GetL10nMessagesMap(const std::string& extension_id) {
   ExtensionToL10nMessagesMap::iterator it =
       g_extension_to_messages_map.Get().messages_map.find(extension_id);
   if (it != g_extension_to_messages_map.Get().messages_map.end())
     return &(it->second);
 
-  return NULL;
+  return nullptr;
 }
 
 void EraseL10nMessagesMap(const std::string& extension_id) {
   g_extension_to_messages_map.Get().messages_map.erase(extension_id);
 }
 
 }  // namespace extensions