Fix issues with protobuf equality comparisons

test/message_test.dart

Index: test/message_test.dart
diff --git a/test/message_test.dart b/test/message_test.dart
index 62af81c3e0c1a018d3530e0113431fb94ef12ec3..5fcf4ca54c0665e6a0722083ce1faff269a3cae0 100644
--- a/test/message_test.dart
+++ b/test/message_test.dart
@@ -7,19 +7,19 @@ library message_test;
 
 import 'package:test/test.dart' show test, expect, predicate, throwsA;
 
-import 'mock_util.dart' show MockMessage;
+import 'mock_util.dart' show MockMessage, mockInfo;
 
 class Rec extends MockMessage {
-  get className => "Rec";
-  Rec create() => new Rec();
+  get info_ => _info;
+  static final _info = mockInfo("Rec", () => new Rec());
 }
 
-throwsError(Type expectedType, String expectedMessage) => throwsA(
-    predicate((x) {
-  expect(x.runtimeType, expectedType);
-  expect(x.message, expectedMessage);
-  return true;
-}));
+throwsError(Type expectedType, String expectedMessage) =>
+    throwsA(predicate((x) {
+      expect(x.runtimeType, expectedType);
+      expect(x.message, expectedMessage);
+      return true;
+    }));
 
 main() {
   test('getField with invalid tag throws exception', () {