Classes: Add support for arguments in default constructor

src/runtime/runtime-object.cc

Index: src/runtime/runtime-object.cc
diff --git a/src/runtime/runtime-object.cc b/src/runtime/runtime-object.cc
index fc97d6b9a0723bc79093eb0cb7be3316406a147d..3b302d160964044fb7e85e1d578e87db11e34496 100644
--- a/src/runtime/runtime-object.cc
+++ b/src/runtime/runtime-object.cc
@@ -242,10 +242,8 @@ MaybeHandle<Object> Runtime::DefineObjectProperty(Handle<JSObject> js_object,
 }
 
 
-RUNTIME_FUNCTION(Runtime_GetPrototype) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
+MaybeHandle<Object> Runtime::GetPrototype(Isolate* isolate,
+                                          Handle<Object> obj) {
   // We don't expect access checks to be needed on JSProxy objects.
   DCHECK(!obj->IsAccessCheckNeeded() || obj->IsJSObject());
   PrototypeIterator iter(isolate, obj, PrototypeIterator::START_AT_RECEIVER);
@@ -257,15 +255,26 @@ RUNTIME_FUNCTION(Runtime_GetPrototype) {
       isolate->ReportFailedAccessCheck(
           Handle<JSObject>::cast(PrototypeIterator::GetCurrent(iter)),
           v8::ACCESS_GET);
-      RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate);
-      return isolate->heap()->undefined_value();
+      RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
+      return isolate->factory()->undefined_value();
     }
     iter.AdvanceIgnoringProxies();
     if (PrototypeIterator::GetCurrent(iter)->IsJSProxy()) {
-      return *PrototypeIterator::GetCurrent(iter);
+      return PrototypeIterator::GetCurrent(iter);
     }
   } while (!iter.IsAtEnd(PrototypeIterator::END_AT_NON_HIDDEN));
-  return *PrototypeIterator::GetCurrent(iter);
+  return PrototypeIterator::GetCurrent(iter);
+}
+
+
+RUNTIME_FUNCTION(Runtime_GetPrototype) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_HANDLE_CHECKED(Object, obj, 0);
+  Handle<Object> result;
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
+                                     Runtime::GetPrototype(isolate, obj));
+  return *result;
 }