Use OrderedHashTables as the backing store of JSSet and JSMap

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 08c3a8bd5703d391fc815aa1445e621124318829..b2e1d67b75af7ca0597b904f3cf304d75a61c623 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -100,15 +100,6 @@ Handle<UnseededNumberDictionary> Factory::NewUnseededNumberDictionary(
 }
 
 
-Handle<ObjectHashSet> Factory::NewObjectHashSet(int at_least_space_for) {
-  ASSERT(0 <= at_least_space_for);
-  CALL_HEAP_FUNCTION(isolate(),
-                     ObjectHashSet::Allocate(isolate()->heap(),
-                                             at_least_space_for),
-                     ObjectHashSet);
-}
-
-
 Handle<OrderedHashSet> Factory::NewOrderedHashSet() {
   return OrderedHashSet::Allocate(isolate(), 4);
 }