ES6: Implement WeakSet

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index b42a35aa2415201bb9bf72dcfc9404f8e656dfed..e64b7f08234fc5f5c89294f6fb8a673026e62fed 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -181,6 +181,9 @@ void HeapObject::HeapObjectVerify() {
     case JS_WEAK_MAP_TYPE:
       JSWeakMap::cast(this)->JSWeakMapVerify();
       break;
+    case JS_WEAK_SET_TYPE:
+      JSWeakSet::cast(this)->JSWeakSetVerify();
+      break;
     case JS_REGEXP_TYPE:
       JSRegExp::cast(this)->JSRegExpVerify();
       break;
@@ -699,6 +702,14 @@ void JSWeakMap::JSWeakMapVerify() {
 }
 
 
+void JSWeakSet::JSWeakSetVerify() {
+  CHECK(IsJSWeakSet());
+  JSObjectVerify();
+  VerifyHeapPointer(table());
+  CHECK(table()->IsHashTable() || table()->IsUndefined());
+}
+
+
 void JSRegExp::JSRegExpVerify() {
   JSObjectVerify();
   CHECK(data()->IsUndefined() || data()->IsFixedArray());