Rollback of r11638, r11636 on trunk branch.

test/mjsunit/regress/regress-1878.js

 // 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 16 matching lines @@
 
 // See: http://code.google.com/p/v8/issues/detail?id=1878
 
 // Flags: --allow-natives-syntax --expose_natives_as=natives
 
 var a = Array();
 
 for (var i = 0; i < 1000; i++) {
   var ai = natives.InternalArray(10000);
   assertFalse(%HaveSameMap(ai, a));
-  assertTrue(%HasFastObjectElements(ai));
+  assertTrue(%HasFastElements(ai));
 }
 
 for (var i = 0; i < 1000; i++) {
   var ai = new natives.InternalArray(10000);
   assertFalse(%HaveSameMap(ai, a));
-  assertTrue(%HasFastObjectElements(ai));
+  assertTrue(%HasFastElements(ai));
 }