Revert part of r13678 (InternalPackedArray).

src/bootstrapper.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 1793 matching lines @@
   {
     // RegExpResult initial map.
 
     // Find global.Array.prototype to inherit from.
     Handle<JSFunction> array_constructor(native_context()->array_function());
     Handle<JSObject> array_prototype(
         JSObject::cast(array_constructor->instance_prototype()));
 
     // Add initial map.
     Handle<Map> initial_map =
-        factory()->NewMap(JS_ARRAY_TYPE,
-                          JSRegExpResult::kSize,
-                          FAST_ELEMENTS);
+        factory()->NewMap(JS_ARRAY_TYPE, JSRegExpResult::kSize);
     initial_map->set_constructor(*array_constructor);
 
     // Set prototype on map.
     initial_map->set_non_instance_prototype(false);
     initial_map->set_prototype(*array_prototype);
 
     // Update map with length accessor from Array and add "index" and "input".
     Handle<DescriptorArray> reresult_descriptors =
         factory()->NewDescriptorArray(0, 3);
     DescriptorArray::WhitenessWitness witness(*reresult_descriptors);
@@ skipping 632 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal