Fix for build issue on Mac introduced in r20948.

src/factory.cc

 // Copyright 2014 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.
 
 #include "factory.h"
 
 #include "macro-assembler.h"
 #include "isolate-inl.h"
 #include "v8conversions.h"
 
@@ skipping 1482 matching lines @@
   // The global object might be created from an object template with accessors.
   // Fill these accessors into the dictionary.
   Handle<DescriptorArray> descs(map->instance_descriptors());
   for (int i = 0; i < map->NumberOfOwnDescriptors(); i++) {
     PropertyDetails details = descs->GetDetails(i);
     ASSERT(details.type() == CALLBACKS);  // Only accessors are expected.
     PropertyDetails d = PropertyDetails(details.attributes(), CALLBACKS, i + 1);
     Handle<Name> name(descs->GetKey(i));
     Handle<Object> value(descs->GetCallbacksObject(i), isolate());
     Handle<PropertyCell> cell = NewPropertyCell(value);
-    NameDictionary::Add(dictionary, name, cell, d);
+    // |dictionary| already contains enough space for all properties.
+    USE(NameDictionary::Add(dictionary, name, cell, d));
   }
 
   // Allocate the global object and initialize it with the backing store.
   Handle<GlobalObject> global = New<GlobalObject>(map, OLD_POINTER_SPACE);
   isolate()->heap()->InitializeJSObjectFromMap(*global, *dictionary, *map);
 
   // Create a new map for the global object.
   Handle<Map> new_map = Map::CopyDropDescriptors(map);
   new_map->set_dictionary_map(true);
 
@@ skipping 811 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal