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

extensions/common/api/sockets/sockets_manifest_handler.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/api/sockets/sockets_manifest_handler.h"
 
 #include "extensions/common/api/sockets/sockets_manifest_data.h"
 #include "extensions/common/api/sockets/sockets_manifest_permission.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 SocketsManifestHandler::SocketsManifestHandler() {}
 
 SocketsManifestHandler::~SocketsManifestHandler() {}
 
 bool SocketsManifestHandler::Parse(Extension* extension,
                                    base::string16* error) {
-  const base::Value* sockets = NULL;
+  const base::Value* sockets = nullptr;
   CHECK(extension->manifest()->Get(manifest_keys::kSockets, &sockets));
   scoped_ptr<SocketsManifestData> data =
       SocketsManifestData::FromValue(*sockets, error);
   if (!data)
     return false;
 
   extension->SetManifestData(manifest_keys::kSockets, data.release());
   return true;
 }
 
 ManifestPermission* SocketsManifestHandler::CreatePermission() {
   return new SocketsManifestPermission();
 }
 
 ManifestPermission* SocketsManifestHandler::CreateInitialRequiredPermission(
     const Extension* extension) {
   SocketsManifestData* data = SocketsManifestData::Get(extension);
   if (data)
     return data->permission()->Clone();
-  return NULL;
+  return nullptr;
 }
 
 const std::vector<std::string> SocketsManifestHandler::Keys() const {
   return SingleKey(manifest_keys::kSockets);
 }
 
 }  // namespace extensions