Wrap map and set implementation in functions.

src/mirror-debugger.js

 // Copyright 2006-2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 "use strict";
 
 // Handle id counters.
 var next_handle_ = 0;
 var next_transient_handle_ = -1;
 
 // Mirror cache.
@@ skipping 1366 matching lines @@
     var entries = %GetWeakMapEntries(this.value_, opt_limit || 0);
     for (var i = 0; i < entries.length; i += 2) {
       result.push({
         key: entries[i],
         value: entries[i + 1]
       });
     }
     return result;
   }
 
-  var iter = %_CallFunction(this.value_, builtins.MapEntries);
+  var iter = %_CallFunction(this.value_, builtins.$mapEntries);
   var next;
   while ((!opt_limit || result.length < opt_limit) &&
          !(next = iter.next()).done) {
     result.push({
       key: next.value[0],
       value: next.value[1]
     });
   }
   return result;
 };
@@ skipping 21 matching lines @@
  * This will keep elements alive for WeakSets.
  *
  * @param {number=} opt_limit Max elements to return.
  * @returns {Array.<Object>} Array of elements of a set.
  */
 SetMirror.prototype.values = function(opt_limit) {
   if (IS_WEAKSET(this.value_)) {
     return %GetWeakSetValues(this.value_, opt_limit || 0);
   }
 
-  var iter = %_CallFunction(this.value_, builtins.SetValues);
-  return IteratorGetValues_(iter, builtins.SetIteratorNextJS, opt_limit);
+  var iter = %_CallFunction(this.value_, builtins.$setValues);
+  return IteratorGetValues_(iter, builtins.$setIteratorNext, opt_limit);
 };
 
 
 function IteratorMirror(value) {
   %_CallFunction(this, value, ITERATOR_TYPE, ObjectMirror);
 }
 inherits(IteratorMirror, ObjectMirror);
 
 
 /**
  * Returns a preview of elements of an iterator.
  * Does not change the backing iterator state.
  *
  * @param {number=} opt_limit Max elements to return.
  * @returns {Array.<Object>} Array of elements of an iterator.
  */
 IteratorMirror.prototype.preview = function(opt_limit) {
   if (IS_MAP_ITERATOR(this.value_)) {
     return IteratorGetValues_(%MapIteratorClone(this.value_),
-                              builtins.MapIteratorNextJS,
+                              builtins.$mapIteratorNext,
                               opt_limit);
   } else if (IS_SET_ITERATOR(this.value_)) {
     return IteratorGetValues_(%SetIteratorClone(this.value_),
-                              builtins.SetIteratorNextJS,
+                              builtins.$setIteratorNext,
                               opt_limit);
   }
 };
 
 
 /**
  * Mirror object for a Generator object.
  * @param {Object} data The Generator object
  * @constructor
  * @extends Mirror
@@ skipping 1597 matching lines @@
   }
   if (!NUMBER_IS_FINITE(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }