Format all files under tools and utils directory.

tools/dom/src/_chrome/custom_dart/app_window.create.dart

 // Copyright (c) 2013, 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.
 
 // TODO(sashab): This override is no longer needed once prefixes are removed.
 void create(String url,
-            [AppWindowCreateWindowOptions options,
-            void callback(AppWindowAppWindow created_window)]) {
+    [AppWindowCreateWindowOptions options,
+    void callback(AppWindowAppWindow created_window)]) {
   void __proxy_callback(created_window) {
     if (callback != null)
       callback(new AppWindowAppWindow._proxy(created_window));
   }
+
   JS('void', '#.create(#, #, #)', this._jsObject, url, convertArgument(options),
-     convertDartClosureToJS(__proxy_callback, 1));
+      convertDartClosureToJS(__proxy_callback, 1));
 }
-