new classes: special construct stub for derived classs and TDZ for `this`.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cb7b78f69dac90e13b9297c33a9040fee2811d58..48dad4b6bfd2e06826bf89f00eb996beaf696a04 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7189,12 +7189,13 @@ class SharedFunctionInfo: public HeapObject {
     kIsGenerator,
     kIsConciseMethod,
     kIsDefaultConstructor,
+    kIsSublclassConstructor,

[arv (Not doing code reviews), 2015/01/23 15:40:46]

typo

[Dmitry Lomov (no reviews), 2015/01/23 21:08:28]

Done.

     kIsAsmFunction,
     kDeserialized,
     kCompilerHintsCount  // Pseudo entry
   };
 
-  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 4> {};
+  class FunctionKindBits : public BitField<FunctionKind, kIsArrow, 5> {};
 
   class DeoptCountBits : public BitField<int, 0, 4> {};
   class OptReenableTriesBits : public BitField<int, 4, 18> {};