Hook up the dartdoc tests to test.py, test.dart, and frog/presubmit.py.

utils/dartdoc/test/dummy.dart

Index: utils/dartdoc/test/dummy.dart
diff --git a/utils/dartdoc/test/dummy.dart b/utils/dartdoc/test/dummy.dart
deleted file mode 100644
index 8bd6b48d6e25dc0d5958b0ae6d68607cc6686882..0000000000000000000000000000000000000000
--- a/utils/dartdoc/test/dummy.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-// A dummy library for testing dartdoc name references.
-#library('dummy');
-
-topLevelMethod() => null;
-
-class Class {
-  method(param) => null;
-  get getterOnly() => null;
-  get getterAndSetter() => null;
-  set getterAndSetter(val) => null;
-  set setterOnly(val) => null;
-}