[HTML Imports] Implement sub-imports processing.

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 22 matching lines @@
 
 #include "core/html/LinkResource.h"
 #include "core/loader/cache/CachedResourceClient.h"
 #include "core/loader/cache/CachedResourceHandle.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
+class CachedResourceLoader;
 class HTMLImportLoader;
 class HTMLImportsController;
 
 //
 // A LinkResource subclasss used for @rel=import.
 //
 class LinkImport : public LinkResource {
     WTF_MAKE_FAST_ALLOCATED;
 public:
 
@@ skipping 41 matching lines @@
     void setState(State);
 
     HTMLImportsController* m_controller;
     State m_state;
     KURL m_url;
     CachedResourceHandle<CachedScript> m_resource;
     RefPtr<Document> m_importedDocument;
 };
 
 
-class HTMLImportsController {
+class HTMLImportsController : public RefCounted<HTMLImportsController> {
     WTF_MAKE_FAST_ALLOCATED;
 public:
-    static PassOwnPtr<HTMLImportsController> create(Document*);
+    static PassRefPtr<HTMLImportsController> create(Document*);
 
     explicit HTMLImportsController(Document*);
     virtual ~HTMLImportsController();
 
     void addImport(PassRefPtr<HTMLImportLoader>);
     void showSecurityErrorMessage(const String&);
     PassRefPtr<HTMLImportLoader> findLinkFor(const KURL&) const;
     SecurityOrigin* securityOrigin() const;
+    CachedResourceLoader* cachedResourceLoader() const;
     bool haveLoaded() const;
     void didLoad();
 
 private:
     Document* m_master;
 
     // List of import which has been loaded or being loaded.
     typedef Vector<RefPtr<HTMLImportLoader> > ImportList;
     ImportList m_imports;
 };
 
 } // namespace WebCore
 
 #endif // HTMLImportsController_h