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

extensions/browser/api/storage/storage_frontend.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/browser/api/storage/storage_frontend.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
@@ skipping 97 matching lines @@
     cache->ShutdownOnUI();
     BrowserThread::DeleteSoon(BrowserThread::FILE, FROM_HERE, cache);
   }
 }
 
 ValueStoreCache* StorageFrontend::GetValueStoreCache(
     settings_namespace::Namespace settings_namespace) const {
   CacheMap::const_iterator it = caches_.find(settings_namespace);
   if (it != caches_.end())
     return it->second;
-  return NULL;
+  return nullptr;
 }
 
 bool StorageFrontend::IsStorageEnabled(
     settings_namespace::Namespace settings_namespace) const {
   return caches_.find(settings_namespace) != caches_.end();
 }
 
 void StorageFrontend::RunWithStorage(
     scoped_refptr<const Extension> extension,
     settings_namespace::Namespace settings_namespace,
@@ skipping 43 matching lines @@
 // static
 BrowserContextKeyedAPIFactory<StorageFrontend>*
 StorageFrontend::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 // static
 const char* StorageFrontend::service_name() { return "StorageFrontend"; }
 
 }  // namespace extensions