HTML Imports: Make sure new imports being added to the "first child"

Source/core/html/imports/HTMLImportChild.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 70 matching lines @@
     virtual void showThis() OVERRIDE;
 #endif
 
     void setClient(HTMLImportChildClient*);
     void clearClient();
     bool loaderHasError() const;
 
     void didFinishLoading();
     void didFinishUpgradingCustomElements();
     bool isLoaded() const;
+    void normalize();
 
 private:
     // RawResourceOwner doing nothing.
     // HTMLImportChild owns the resource so that the contents of prefetched Resource doesn't go away.
     virtual void responseReceived(Resource*, const ResourceResponse&) OVERRIDE { }
     virtual void dataReceived(Resource*, const char*, int) OVERRIDE { }
     virtual void notifyFinished(Resource*) OVERRIDE { }
 
     void didFinish();
     void createLoader();
@@ skipping 14 matching lines @@
 
 inline HTMLImportChild* toHTMLImportChild(HTMLImport* import)
 {
     ASSERT(!import || import->isChild());
     return static_cast<HTMLImportChild*>(import);
 }
 
 } // namespace WebCore
 
 #endif // HTMLImportChild_h