Optimized calling of C++ builtins (and HandleApiCall

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index 2a80953eb146ce973f0f894cbb468d476d3ee3d4..a406350c7da7f4c8fb9dfdd25ac66c1892be2d40 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -766,6 +766,8 @@ Handle<JSObject> Factory::NewArgumentsObject(Handle<Object> callee,
 Handle<JSFunction> Factory::CreateApiFunction(
     Handle<FunctionTemplateInfo> obj, ApiInstanceType instance_type) {
   Handle<Code> code = Handle<Code>(Builtins::builtin(Builtins::HandleApiCall));
+  Handle<Code> construct_stub =
+      Handle<Code>(Builtins::builtin(Builtins::JSConstructStubApi));
 
   int internal_field_count = 0;
   if (!obj->instance_template()->IsUndefined()) {
@@ -840,6 +842,7 @@ Handle<JSFunction> Factory::CreateApiFunction(
   }
 
   result->shared()->set_function_data(*obj);
+  result->shared()->set_construct_stub(*construct_stub);
   result->shared()->DontAdaptArguments();
 
   // Recursively copy parent templates' accessors, 'data' may be modified.