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

src/builtins.h

Index: src/builtins.h
diff --git a/src/builtins.h b/src/builtins.h
index 91f674191b749788801b7b5684dae5c8a8fcd84b..6563a86dd654bd2951edc97d53d315d2da7c1913 100644
--- a/src/builtins.h
+++ b/src/builtins.h
@@ -67,6 +67,7 @@ enum BuiltinExtraArguments {
   V(ArgumentsAdaptorTrampoline, BUILTIN, UNINITIALIZED, kNoExtraICState)       \
   V(InOptimizationQueue, BUILTIN, UNINITIALIZED, kNoExtraICState)              \
   V(JSConstructStubGeneric, BUILTIN, UNINITIALIZED, kNoExtraICState)           \
+  V(JSConstructStubForDerived, BUILTIN, UNINITIALIZED, kNoExtraICState)        \
   V(JSConstructStubApi, BUILTIN, UNINITIALIZED, kNoExtraICState)               \
   V(JSEntryTrampoline, BUILTIN, UNINITIALIZED, kNoExtraICState)                \
   V(JSConstructEntryTrampoline, BUILTIN, UNINITIALIZED, kNoExtraICState)       \
@@ -298,6 +299,7 @@ class Builtins {
   static void Generate_CompileOptimized(MacroAssembler* masm);
   static void Generate_CompileOptimizedConcurrent(MacroAssembler* masm);
   static void Generate_JSConstructStubGeneric(MacroAssembler* masm);
+  static void Generate_JSConstructStubForDerived(MacroAssembler* masm);
   static void Generate_JSConstructStubApi(MacroAssembler* masm);
   static void Generate_JSEntryTrampoline(MacroAssembler* masm);
   static void Generate_JSConstructEntryTrampoline(MacroAssembler* masm);