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

extensions/renderer/module_system.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/renderer/module_system.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/stl_util.h"
@@ skipping 409 matching lines @@
                                 const std::string& module_field,
                                 v8::AccessorGetterCallback getter) {
   v8::HandleScope handle_scope(GetIsolate());
   v8::Handle<v8::Object> parameters = v8::Object::New(GetIsolate());
   parameters->Set(v8::String::NewFromUtf8(GetIsolate(), kModuleName),
                   v8::String::NewFromUtf8(GetIsolate(), module_name.c_str()));
   parameters->Set(v8::String::NewFromUtf8(GetIsolate(), kModuleField),
                   v8::String::NewFromUtf8(GetIsolate(), module_field.c_str()));
   object->SetAccessor(v8::String::NewFromUtf8(GetIsolate(), field.c_str()),
                       getter,
-                      NULL,
+                      nullptr,
                       parameters);
 }
 
 void ModuleSystem::SetNativeLazyField(v8::Handle<v8::Object> object,
                                       const std::string& field,
                                       const std::string& module_name,
                                       const std::string& module_field) {
   SetLazyField(object,
                field,
                module_name,
@@ skipping 220 matching lines @@
     v8::Handle<v8::Value> value) {
   if (!is_valid())
     return;
   v8::HandleScope handle_scope(GetIsolate());
   v8::Handle<v8::Promise::Resolver> resolver_local(
       v8::Local<v8::Promise::Resolver>::New(GetIsolate(), *resolver));
   resolver_local->Resolve(value);
 }
 
 }  // namespace extensions