ES6 Map/Set iterators/forEach improvements

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index b72988dc18818d8a60f6ec0f48198fe22bf6bd44..6c0daacdba25d356aa7cfd9560290b324ac9f14e 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -702,13 +702,7 @@ void JSSetIterator::JSSetIteratorVerify() {
   VerifyHeapPointer(table());
   CHECK(table()->IsOrderedHashTable() || table()->IsUndefined());
   CHECK(index()->IsSmi());
-  CHECK(count()->IsSmi());
   CHECK(kind()->IsSmi());
-  VerifyHeapPointer(next_iterator());
-  CHECK(next_iterator()->IsJSSetIterator() || next_iterator()->IsUndefined());
-  VerifyHeapPointer(table());
-  CHECK(previous_iterator()->IsJSSetIterator()
-        || previous_iterator()->IsUndefined());
 }
 
 
@@ -718,13 +712,7 @@ void JSMapIterator::JSMapIteratorVerify() {
   VerifyHeapPointer(table());
   CHECK(table()->IsOrderedHashTable() || table()->IsUndefined());
   CHECK(index()->IsSmi());
-  CHECK(count()->IsSmi());
   CHECK(kind()->IsSmi());
-  VerifyHeapPointer(next_iterator());
-  CHECK(next_iterator()->IsJSMapIterator() || next_iterator()->IsUndefined());
-  VerifyHeapPointer(table());
-  CHECK(previous_iterator()->IsJSMapIterator()
-        || previous_iterator()->IsUndefined());
 }