Revert "Fix observatory tests broken by running dartfmt."

runtime/bin/vmservice/vmservice_io.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.
 
 library vmservice_io;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert';
 import 'dart:io';
@@ skipping 128 matching lines @@
   IOSink sink = await file.openWrite();
   await sink.addStream(bytes);
   await sink.close();
 }
 
 Future<List<int>> readFileCallback(Uri path) async {
   var file = new File.fromUri(path);
   return await file.readAsBytes();
 }
 
-Future<List<Map<String, String>>> listFilesCallback(Uri dirPath) async {
+Future<List<Map<String,String>>> listFilesCallback(Uri dirPath) async {
   var dir = new Directory.fromUri(dirPath);
   var dirPathStr = dirPath.path;
   var stream = dir.list(recursive: true);
   var result = [];
   await for (var fileEntity in stream) {
     var filePath = new Uri.file(fileEntity.path).path;
     var stat = await fileEntity.stat();
     if (stat.type == FileSystemEntityType.FILE &&
         filePath.startsWith(dirPathStr)) {
       var map = {};
@@ skipping 82 matching lines @@
     Timer.run(() {});
   }
   scriptLoadPort.handler = _processLoadRequest;
   // Register signal handler after a small delay to avoid stalling main
   // isolate startup.
   _registerSignalHandlerTimer = new Timer(shortDelay, _registerSignalHandler);
   return scriptLoadPort;
 }
 
 _shutdown() native "VMServiceIO_Shutdown";