Create(nsFixedSizeAllocator& aPool, const nsCString& aURL, nsIContent* aBoundElement) {
Create(nsFixedSizeAllocator& aPool, nsIURL* aURL, nsIContent* aBoundElement) {
  Create(nsFixedSizeAllocator& aPool, const nsCString& aURL, nsIContent* aBoundElement) {    void* place = aPool.Alloc(sizeof(nsXBLBindingRequest));    return place ? ::new (place) nsXBLBindingRequest(aURL, aBoundElement) : nsnull;  }