Fix issue with Array.concat not preserving holes in the

src/factory.cc

 // Copyright 2006-2008 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 24 matching lines @@
 
 namespace v8 { namespace internal {
 
 
 Handle<FixedArray> Factory::NewFixedArray(int size, PretenureFlag pretenure) {
   ASSERT(0 <= size);
   CALL_HEAP_FUNCTION(Heap::AllocateFixedArray(size, pretenure), FixedArray);
 }
 
 
+Handle<FixedArray> Factory::NewFixedArrayWithHoles(int size) {
+  ASSERT(0 <= size);
+  CALL_HEAP_FUNCTION(Heap::AllocateFixedArrayWithHoles(size), FixedArray);
+}
+
+
 Handle<Dictionary> Factory::NewDictionary(int at_least_space_for) {
   ASSERT(0 <= at_least_space_for);
   CALL_HEAP_FUNCTION(Dictionary::Allocate(at_least_space_for), Dictionary);
 }
 
 
 Handle<DescriptorArray> Factory::NewDescriptorArray(int number_of_descriptors) {
   ASSERT(0 <= number_of_descriptors);
   CALL_HEAP_FUNCTION(DescriptorArray::Allocate(number_of_descriptors),
                      DescriptorArray);
@@ skipping 783 matching lines @@
     Execution::ConfigureInstance(instance,
                                  instance_template,
                                  pending_exception);
   } else {
     *pending_exception = false;
   }
 }
 
 
 } }  // namespace v8::internal