Make OptionElement construtor arguments named optional parameters.

tests/html/selectelement_test.dart

Index: tests/html/selectelement_test.dart
diff --git a/tests/html/selectelement_test.dart b/tests/html/selectelement_test.dart
index 717502f505f1312d696046ac1f7f5d94c2622d52..f88c4af5275bb4c679d3a68978976388d43d62e0 100644
--- a/tests/html/selectelement_test.dart
+++ b/tests/html/selectelement_test.dart
@@ -16,9 +16,11 @@ main() {
     var options = [
       new OptionElement(),
       new DivElement(),
-      new OptionElement('data', 'two', false, true),
+      new OptionElement(data: 'data', value: 'two', defaultSelected: false,
+          selected: true),
       new DivElement(),
-      new OptionElement('data', 'two', false, true),
+      new OptionElement(data: 'data', value: 'two', defaultSelected: false,
+          selected: true),
       new OptionElement(),
     ];
     element.children.addAll(options);
@@ -32,9 +34,11 @@ main() {
     var options = [
       new OptionElement(),
       new DivElement(),
-      new OptionElement('data', 'two', false, true),
+      new OptionElement(data: 'data', value: 'two', defaultSelected: false,
+          selected: true),
       new DivElement(),
-      new OptionElement('data', 'two', false, true),
+      new OptionElement(data: 'data', value: 'two', defaultSelected: false,
+          selected: true),
       new OptionElement(),
     ];
     element.children.addAll(options);
@@ -47,8 +51,10 @@ main() {
     var element = new SelectElement();
     var options = [
       new OptionElement(),
-      new OptionElement('data', 'two', false, true),
-      new OptionElement('data', 'two', false, true),
+      new OptionElement(data: 'data', value: 'two', defaultSelected: false,
+          selected: true),
+      new OptionElement(data: 'data', value: 'two', defaultSelected: false,
+          selected: true),
       new OptionElement(),
     ];
     element.children.addAll(options);