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

extensions/renderer/binding_generating_native_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/renderer/binding_generating_native_handler.h"
 
 #include "extensions/renderer/module_system.h"
 
 namespace extensions {
 
@@ skipping 16 matching lines @@
           .As<v8::Function>();
   v8::Handle<v8::Value> argv[] = {
       v8::String::NewFromUtf8(isolate, api_name_.c_str())};
   v8::Handle<v8::Object> binding_instance =
       create_binding->Call(binding, arraysize(argv), argv)->ToObject();
   v8::Handle<v8::Function> generate =
       binding_instance->Get(v8::String::NewFromUtf8(isolate, "generate"))
           .As<v8::Function>();
   v8::Local<v8::Object> object = v8::Object::New(isolate);
   v8::Handle<v8::Value> compiled_schema =
-      generate->Call(binding_instance, 0, NULL);
+      generate->Call(binding_instance, 0, nullptr);
   if (!compiled_schema.IsEmpty()) {
     object->Set(v8::String::NewFromUtf8(isolate, bind_to_.c_str()),
                 compiled_schema);
   }
   return scope.Escape(object);
 }
 
 }  // namespace extensions