Keep new arrays allocated with 'new Array(N)' in fast mode

test/mjsunit/allocation-site-info.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 279 matching lines @@
   a[0] = value;
   return a;
 }
 
 obj = newarraycase_onearg(5, 3.5);
 assertKind(elements_kind.fast_double, obj);
 obj = newarraycase_onearg(10, 5);
 assertKind(elements_kind.fast_double, obj);
 obj = newarraycase_onearg(0, 5);
 assertKind(elements_kind.fast_double, obj);
-// Now pass a length that forces the dictionary path.
-obj = newarraycase_onearg(100000, 5);
-assertKind(elements_kind.dictionary, obj);
-assertTrue(obj.length == 100000);
 
 // Verify that cross context calls work
 var realmA = Realm.current();
 var realmB = Realm.create();
 assertEquals(0, realmA);
 assertEquals(1, realmB);
 
 function instanceof_check(type) {
   assertTrue(new type() instanceof type);
   assertTrue(new type(5) instanceof type);
@@ skipping 150 matching lines @@
   assertKind(elements_kind.fast_smi_only, obj[1][0]);
   obj[0][0] = 3.5;
   obj[1][0][0] = "goodbye";
   assertKind(elements_kind.fast_double, obj[0]);
   assertKind(elements_kind.fast, obj[1][0]);
 
   obj = get_deep_nested_literal();
   assertKind(elements_kind.fast_double, obj[0]);
   assertKind(elements_kind.fast, obj[1][0]);
 })();