Minor cleanup and optimisation of element methods.

src/elements.cc

 // Copyright 2012 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 510 matching lines @@
   }
 
   virtual void Validate(JSObject* holder) {
     ElementsAccessorSubclass::ValidateImpl(holder);
   }
 
   static bool HasElementImpl(Object* receiver,
                              JSObject* holder,
                              uint32_t key,
                              BackingStore* backing_store) {
-    MaybeObject* element =
-        ElementsAccessorSubclass::GetImpl(receiver, holder, key, backing_store);
-    return !element->IsTheHole();
+    return ElementsAccessorSubclass::GetAttributesImpl(
+        receiver, holder, key, backing_store) != ABSENT;
   }
 
   virtual bool HasElement(Object* receiver,
                           JSObject* holder,
                           uint32_t key,
                           FixedArrayBase* backing_store) {
     if (backing_store == NULL) {
       backing_store = holder->elements();
     }
     return ElementsAccessorSubclass::HasElementImpl(
@@ skipping 1204 matching lines @@
   if (!maybe_obj->To(&new_backing_store)) return maybe_obj;
   new_backing_store->set(0, length);
   { MaybeObject* result = array->SetContent(new_backing_store);
     if (result->IsFailure()) return result;
   }
   return array;
 }
 
 
 } }  // namespace v8::internal