Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/bindings/v8/ScriptPromiseResolverTest.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 47 matching lines @@
         v8::Handle<v8::Context> context(m_context.newLocal(m_isolate));
         V8PerContextDataHolder::install(context, DOMWrapperWorld::current(m_isolate));
         m_perContextData = V8PerContextData::create(context);
         m_perContextData->init();
         m_promise = ScriptPromise::createPending();
         m_resolver = ScriptPromiseResolver::create(m_promise);
     }
 
     void TearDown()
     {
-        m_resolver = 0;
+        m_resolver = nullptr;
         m_promise.clear();
         m_perContextData.clear();
     }
 
     V8PromiseCustom::PromiseState state()
     {
         return V8PromiseCustom::getState(V8PromiseCustom::getInternal(promise()));
     }
 
     v8::Local<v8::Value> result()
@@ skipping 88 matching lines @@
     m_resolver->reject(ScriptValue(v8::Integer::New(m_isolate, 4), m_isolate));
     EXPECT_FALSE(m_resolver->isPending());
     EXPECT_EQ(V8PromiseCustom::Fulfilled, state());
     ASSERT_TRUE(result()->IsNumber());
     EXPECT_EQ(3, result().As<v8::Integer>()->Value());
 }
 
 } // namespace
 
 } // namespace WebCore