Add an extra guard to replaceDocument()

Source/core/loader/DocumentLoader.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 39 matching lines @@
 namespace WTF {
 class SchedulePair;
 }
 
 namespace blink {
     class ApplicationCacheHost;
     class ArchiveResource;
     class ArchiveResourceCollection;
     class ResourceFetcher;
     class ContentFilter;
+    class DocumentInit;
     class FormState;
     class LocalFrame;
     class FrameLoader;
     class MHTMLArchive;
     class Page;
     class ResourceLoader;
     class SharedBuffer;
 
     class DocumentLoader : public RefCounted<DocumentLoader>, private RawResourceClient {
         WTF_MAKE_FAST_ALLOCATED;
     public:
         static PassRefPtr<DocumentLoader> create(LocalFrame* frame, const ResourceRequest& request, const SubstituteData& data)
         {
             return adoptRef(new DocumentLoader(frame, request, data));
         }
         virtual ~DocumentLoader();
 
         LocalFrame* frame() const { return m_frame; }
 
         void detachFromFrame();
 
         unsigned long mainResourceIdentifier() const;
 
-        void replaceDocument(const String& source, Document*);
+        void replaceDocument(const DocumentInit&, const String& source, Document*);
 
         const AtomicString& mimeType() const;
 
         void setUserChosenEncoding(const String& charset);
 
         const ResourceRequest& originalRequest() const;
 
         const ResourceRequest& request() const;
 
         ResourceFetcher* fetcher() const { return m_fetcher.get(); }
@@ skipping 41 matching lines @@
         void clearRedirectChain();
         void appendRedirect(const KURL&);
 
     protected:
         DocumentLoader(LocalFrame*, const ResourceRequest&, const SubstituteData&);
 
         Vector<KURL> m_redirectChain;
 
     private:
         static PassRefPtrWillBeRawPtr<DocumentWriter> createWriterFor(LocalFrame*, const Document* ownerDocument, const KURL&, const AtomicString& mimeType, const AtomicString& encoding, bool dispatch);
+        static PassRefPtrWillBeRawPtr<DocumentWriter> createWriterFor(const Document* ownerDocument, const DocumentInit&, const AtomicString& mimeType, const AtomicString& encoding, bool dispatch);
 
         void ensureWriter(const AtomicString& mimeType, const KURL& overridingURL = KURL());
         void endWriting(DocumentWriter*);
 
         Document* document() const;
         FrameLoader* frameLoader() const;
 
         void commitIfReady();
         void commitData(const char* bytes, size_t length);
         void setMainDocumentError(const ResourceError&);
@@ skipping 61 matching lines @@
         DocumentLoadTiming m_documentLoadTiming;
 
         double m_timeOfLastDataReceived;
 
         friend class ApplicationCacheHost;  // for substitute resource delivery
         OwnPtr<ApplicationCacheHost> m_applicationCacheHost;
     };
 }
 
 #endif // DocumentLoader_h