ES6: Add support for Map.prototype.forEach and Set.prototype.forEach

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index a59b1e9ae8094a9c171192674ba0c48b27cd9b56..f137e1aaebfb33ddfd6333283e9b01e72802880b 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -174,6 +174,12 @@ void HeapObject::HeapObjectPrint(FILE* out) {
     case JS_MAP_TYPE:
       JSMap::cast(this)->JSMapPrint(out);
       break;
+    case JS_SET_ITERATOR_TYPE:
+      JSSetIterator::cast(this)->JSSetIteratorPrint(out);
+      break;
+    case JS_MAP_ITERATOR_TYPE:
+      JSMapIterator::cast(this)->JSMapIteratorPrint(out);
+      break;
     case JS_WEAK_MAP_TYPE:
       JSWeakMap::cast(this)->JSWeakMapPrint(out);
       break;
@@ -759,6 +765,37 @@ void JSMap::JSMapPrint(FILE* out) {
 }
 
 
+template<class Derived, class TableType>
+void OrderedHashTableIterator<Derived, TableType>::
+    OrderedHashTableIteratorPrint(FILE* out) {
+  PrintF(out, " - table = ");
+  table()->ShortPrint(out);
+  PrintF(out, " - index = ");
+  index()->ShortPrint(out);
+  PrintF(out, " - count = ");
+  count()->ShortPrint(out);
+  PrintF(out, " - kind = ");
+  kind()->ShortPrint(out);
+  PrintF(out, " - next_iterator = ");
+  next_iterator()->ShortPrint(out);
+  PrintF(out, " - previous_iterator = ");
+  previous_iterator()->ShortPrint(out);
+  PrintF(out, "\n");
+}
+
+
+void JSSetIterator::JSSetIteratorPrint(FILE* out) {
+  HeapObject::PrintHeader(out, "JSSetIterator");
+  OrderedHashTableIteratorPrint(out);
+}
+
+
+void JSMapIterator::JSMapIteratorPrint(FILE* out) {
+  HeapObject::PrintHeader(out, "JSMapIterator");
+  OrderedHashTableIteratorPrint(out);
+}
+
+
 void JSWeakMap::JSWeakMapPrint(FILE* out) {
   HeapObject::PrintHeader(out, "JSWeakMap");
   PrintF(out, " - map = %p\n", reinterpret_cast<void*>(map()));