[turbofan] Support handling of default super calls.

src/bootstrapper.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/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/utils/random-number-generator.h"
 #include "src/code-stubs.h"
@@ skipping 1917 matching lines @@
   Handle<HeapObject> flag(FLAG_harmony_unicode_regexps ? heap()->true_value()
                                                        : heap()->false_value());
   Runtime::SetObjectProperty(isolate(), builtins,
                              factory()->harmony_unicode_regexps_string(), flag,
                              STRICT).Assert();
 }
 
 
 void Genesis::InitializeGlobal_harmony_reflect() {
   Handle<JSObject> builtins(native_context()->builtins());
-  // Install references to functions of the Reflect object
-  if (FLAG_harmony_reflect || FLAG_harmony_spreadcalls) {
-    Handle<JSFunction> apply = InstallFunction(
-        builtins, "$reflectApply", JS_OBJECT_TYPE, JSObject::kHeaderSize,
-        MaybeHandle<JSObject>(), Builtins::kReflectApply);
-    Handle<JSFunction> construct = InstallFunction(
-        builtins, "$reflectConstruct", JS_OBJECT_TYPE, JSObject::kHeaderSize,
-        MaybeHandle<JSObject>(), Builtins::kReflectConstruct);
-    apply->shared()->set_internal_formal_parameter_count(3);
-    apply->shared()->set_length(3);
 
-    construct->shared()->set_internal_formal_parameter_count(3);
-    construct->shared()->set_length(2);
-  }
+  Handle<JSFunction> apply = InstallFunction(
+      builtins, "$reflectApply", JS_OBJECT_TYPE, JSObject::kHeaderSize,
+      MaybeHandle<JSObject>(), Builtins::kReflectApply);
+  apply->shared()->set_internal_formal_parameter_count(3);
+  apply->shared()->set_length(3);
+
+  Handle<JSFunction> construct = InstallFunction(
+      builtins, "$reflectConstruct", JS_OBJECT_TYPE, JSObject::kHeaderSize,
+      MaybeHandle<JSObject>(), Builtins::kReflectConstruct);
+  construct->shared()->set_internal_formal_parameter_count(3);
+  construct->shared()->set_length(2);
 
   if (!FLAG_harmony_reflect) return;
+
   Handle<JSGlobalObject> global(JSGlobalObject::cast(
       native_context()->global_object()));
   Handle<String> reflect_string =
       factory()->NewStringFromStaticChars("Reflect");
   Handle<Object> reflect =
       factory()->NewJSObject(isolate()->object_function(), TENURED);
   JSObject::AddProperty(global, reflect_string, reflect, DONT_ENUM);
 }
 
 
@@ skipping 1350 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8