Clean up the Windows watcher.

pkg/watcher/test/directory_watcher/shared.dart

Index: pkg/watcher/test/directory_watcher/shared.dart
diff --git a/pkg/watcher/test/directory_watcher/shared.dart b/pkg/watcher/test/directory_watcher/shared.dart
index 849cea00dcc1580c90e2680c9f6a1327b50985db..d3575ea4d4380193444bf97d8cf2eb4144a09162 100644
--- a/pkg/watcher/test/directory_watcher/shared.dart
+++ b/pkg/watcher/test/directory_watcher/shared.dart
@@ -78,6 +78,20 @@ sharedTests() {
     ]);
   });
 
+  test('when the watched directory is moved, removes all files', () {
+    writeFile("dir/a.txt");
+    writeFile("dir/b.txt");
+
+    startWatcher(dir: "dir");
+
+    renameDir("dir", "moved_dir");
+    createDir("dir");
+    inAnyOrder([
+      isRemoveEvent("dir/a.txt"),
+      isRemoveEvent("dir/b.txt")
+    ]);
+  });
+
   group("moves", () {
     test('notifies when a file is moved within the watched directory', () {
       writeFile("old.txt");