Use nullptr_t for RefPtr, PassRefPtr and RawPtr.

Source/core/inspector/InspectorResourceAgent.cpp

 /*
  * Copyright (C) 2011 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 139 matching lines @@
     }
 
     void setLoader(PassRefPtr<ThreadableLoader> loader)
     {
         m_loader = loader;
     }
 
 private:
     void dispose()
     {
-        m_loader = 0;
+        m_loader = nullptr;
         delete this;
     }
 
     RefPtr<LoadResourceForFrontendCallback> m_callback;
     RefPtr<ThreadableLoader> m_loader;
     OwnPtr<TextResourceDecoder> m_decoder;
     ScriptString m_responseText;
     int m_statusCode;
     HTTPHeaderMap m_responseHeaders;
 };
@@ skipping 53 matching lines @@
         Vector<char> bytes;
         request.httpBody()->flatten(bytes);
         requestObject->setPostData(String::fromUTF8WithLatin1Fallback(bytes.data(), bytes.size()));
     }
     return requestObject;
 }
 
 static PassRefPtr<TypeBuilder::Network::Response> buildObjectForResourceResponse(const ResourceResponse& response, DocumentLoader* loader)
 {
     if (response.isNull())
-        return 0;
-
+        return nullptr;
 
     double status;
     String statusText;
     if (response.resourceLoadInfo() && response.resourceLoadInfo()->httpStatusCode) {
         status = response.resourceLoadInfo()->httpStatusCode;
         statusText = response.resourceLoadInfo()->httpStatusText;
     } else {
         status = response.httpStatusCode();
         statusText = response.httpStatusText();
     }
@@ skipping 563 matching lines @@
     : InspectorBaseAgent<InspectorResourceAgent>("Network")
     , m_pageAgent(pageAgent)
     , m_client(client)
     , m_frontend(0)
     , m_resourcesData(adoptPtr(new NetworkResourcesData()))
     , m_isRecalculatingStyle(false)
 {
 }
 
 } // namespace WebCore