Remove named load from builtin in default super call.

src/runtime/runtime-classes.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include <stdlib.h>
 #include <limits>
 
 #include "src/arguments.h"
@@ skipping 533 matching lines @@
   // Prepare the array containing all passed arguments.
   int argument_count = frame->GetArgumentsLength();
   Handle<FixedArray> elements =
       isolate->factory()->NewUninitializedFixedArray(argument_count);
   for (int i = 0; i < argument_count; ++i) {
     elements->set(i, frame->GetParameter(i));
   }
   Handle<JSArray> arguments = isolate->factory()->NewJSArrayWithElements(
       elements, FAST_ELEMENTS, argument_count);
 
-  // Call $reflectConstruct(<super>, <args>, <new.target>) now.
-  Handle<Object> reflect;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, reflect,
-      Object::GetProperty(isolate,
-                          handle(isolate->native_context()->builtins()),
-                          "$reflectConstruct"));
-  RUNTIME_ASSERT(reflect->IsJSFunction());  // Depends on --harmony-reflect.
+  // Call %reflect_construct(<super>, <args>, <new.target>) now.
+  Handle<JSFunction> reflect = isolate->reflect_construct();
   Handle<Object> argv[] = {super_constructor, arguments, original_constructor};
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result,
       Execution::Call(isolate, reflect, isolate->factory()->undefined_value(),
                       arraysize(argv), argv));
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8