Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/bindings/v8/ScriptValue.h

 /*
  * Copyright (C) 2008, 2009 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 34 matching lines @@
 class ScriptValue {
 public:
     ScriptValue()
         : m_isolate(0)
     { }
 
     virtual ~ScriptValue();
 
     ScriptValue(v8::Handle<v8::Value> value, v8::Isolate* isolate)
         : m_isolate(isolate)
-        , m_value(value.IsEmpty() ? 0 : SharedPersistent<v8::Value>::create(value, isolate))
+        , m_value(value.IsEmpty() ? nullptr : SharedPersistent<v8::Value>::create(value, isolate))
     {
     }
 
     ScriptValue(const ScriptValue& value)
         : m_isolate(value.m_isolate)
         , m_value(value.m_value)
     {
     }
 
     v8::Isolate* isolate() const
@@ skipping 78 matching lines @@
         return !value.IsEmpty() && value->IsObject();
     }
 
     bool hasNoValue() const
     {
         return !m_value.get() || m_value->isEmpty();
     }
 
     void clear()
     {
-        m_value = 0;
+        m_value = nullptr;
     }
 
     v8::Handle<v8::Value> v8Value() const
     {
         return m_value.get() ? m_value->newLocal(m_isolate) : v8::Handle<v8::Value>();
     }
 
     bool getString(String& result) const;
     String toString() const;
 
     PassRefPtr<JSONValue> toJSONValue(ScriptState*) const;
 
 private:
     mutable v8::Isolate* m_isolate;
     RefPtr<SharedPersistent<v8::Value> > m_value;
 };
 
 } // namespace WebCore
 
 #endif // ScriptValue_h