Fix 2 failing tests on windows.

editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetEvent.java

Index: editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetEvent.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetEvent.java	(revision 16302)
+++ editor/tools/plugins/com.google.dart.tools.core/src/com/google/dart/tools/core/internal/directoryset/DirectorySetEvent.java	(working copy)
@@ -1,29 +0,0 @@
-/*
- * Copyright (c) 2012, the Dart project authors.
- * 
- * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except
- * in compliance with the License. You may obtain a copy of the License at
- * 
- * http://www.eclipse.org/legal/epl-v10.html
- * 
- * Unless required by applicable law or agreed to in writing, software distributed under the License
- * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
- * or implied. See the License for the specific language governing permissions and limitations under
- * the License.
- */
-package com.google.dart.tools.core.internal.directoryset;
-
-/**
- * Class represents some change in the {@link DirectorySetManager}.
- * <p>
- * Currently, whenever there is a change the entire refresh on the Files viewer, thus other than an
- * event being passed, we don't need any information.
- * <p>
- * TODO(jwren) Add context to this event object, so that the refresh can be faster in the Files
- * view.
- * 
- * @see DirectorySetManager
- * @see DirectorySetListener
- */
-public class DirectorySetEvent {
-}