Use Dart_New to construct OSError objects instead of the static

runtime/bin/dartutils.cc

Index: runtime/bin/dartutils.cc
diff --git a/runtime/bin/dartutils.cc b/runtime/bin/dartutils.cc
index e148bfccc4b4feb265926294144a225ac31615b4..81e8f72e0d472e5514a94d4e0cab9845715b63ad 100644
--- a/runtime/bin/dartutils.cc
+++ b/runtime/bin/dartutils.cc
@@ -311,14 +311,16 @@ Dart_Handle DartUtils::NewDartOSError(OSError* os_error) {
   if (Dart_IsError(url)) return url;
   Dart_Handle lib = Dart_LookupLibrary(url);
   if (Dart_IsError(lib)) return lib;
-  Dart_Handle function_name = Dart_NewString("_makeOSError");
-  if (Dart_IsError(function_name)) return function_name;
+  Dart_Handle class_name = Dart_NewString("OSError");
+  if (Dart_IsError(class_name)) return class_name;
+  Dart_Handle clazz = Dart_GetClass(lib, class_name);
+  if (Dart_IsError(clazz)) return clazz;
   Dart_Handle args[2];
   args[0] = Dart_NewString(os_error->message());
   if (Dart_IsError(args[0])) return args[0];
   args[1] = Dart_NewInteger(os_error->code());
   if (Dart_IsError(args[1])) return args[1];
-  Dart_Handle err = Dart_Invoke(lib, function_name, 2, args);
+  Dart_Handle err = Dart_New(clazz, Dart_Null(), 2, args);
   return err;
 }