[HTML Imports] Make HTMLLinkElement.import a Document.

Source/core/html/HTMLImportsController.h

 /*
  * 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 48 matching lines @@
     static PassRefPtr<LinkImport> create(HTMLLinkElement* owner);
 
     explicit LinkImport(HTMLLinkElement* owner);
     virtual ~LinkImport();
 
     // LinkResource
     virtual void process() OVERRIDE;
     virtual Type type() const OVERRIDE { return Import; }
     virtual void ownerRemoved() OVERRIDE;
 
-    DocumentFragment* importedFragment() const;
+    Document* importedDocument() const;
     const KURL& url() const { return m_url; }
     void importDestroyed();
     bool isDone() const { return m_state == StateReady || m_state == StateError; }
 
 private:
     State startRequest();
     State finish();
     void setState(State);
 
     // CachedResourceClient
     virtual void notifyFinished(CachedResource*) OVERRIDE;
 
     HTMLImportsController* m_controller;
     LinkImport* m_ofSameLocation;
     KURL m_url;
     State m_state;
     CachedResourceHandle<CachedScript> m_resource;
-    RefPtr<DocumentFragment> m_importedFragment;
+    RefPtr<Document> m_importedDocument;
 };
 
 
 class HTMLImportsController {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassOwnPtr<HTMLImportsController> create(Document*);
 
     explicit HTMLImportsController(Document*);
     virtual ~HTMLImportsController();
 
     void addImport(PassRefPtr<LinkImport>);
     void showSecurityErrorMessage(const String&);
-    PassRefPtr<DocumentFragment> createDocumentFragment() const;
     PassRefPtr<LinkImport> findLinkFor(const KURL&) const;
     SecurityOrigin* securityOrigin() const;
     bool haveLoaded() const;
     void didLoad();
 
 private:
 
     Document* m_master;
-    RefPtr<Document> m_importedFragmentOwner;
 
     // List of import which has been loaded or being loaded.
     typedef Vector<RefPtr<LinkImport> > ImportList;
     ImportList m_imports;
 };
 
 } // namespace WebCore
 
 #endif // HTMLImportsController_h