Use dartfmt on Observatory code

runtime/observatory/lib/service_io.dart

 // Copyright (c) 2014, 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 service_io;
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:logging/logging.dart';
 import 'package:observatory/service_common.dart';
 
 // Export the service library.
 export 'package:observatory/service_common.dart';
 
 class _IOWebSocket implements CommonWebSocket {
   WebSocket _webSocket;
 
-  void connect(String address,
-               void onOpen(),
-               void onMessage(dynamic data),
-               void onError(),
-               void onClose()) {
+  void connect(String address, void onOpen(), void onMessage(dynamic data),
+      void onError(), void onClose()) {
     WebSocket.connect(address).then((WebSocket socket) {
       _webSocket = socket;
-      _webSocket.listen(
-          onMessage,
+      _webSocket.listen(onMessage,
           onError: (dynamic) => onError(),
           onDone: onClose,
           cancelOnError: true);
       onOpen();
     }).catchError((e, st) {
       onError();
     });
   }
 
   bool get isOpen =>
       (_webSocket != null) && (_webSocket.readyState == WebSocket.OPEN);
 
   void send(dynamic data) {
     _webSocket.add(data);
   }
 
   void close() {
     if (_webSocket != null) {
       _webSocket.close();
     }
   }
 
   Future<ByteData> nonStringToByteData(dynamic data) {
     assert(data is Uint8List);
     Logger.root.info('Binary data size in bytes: ${data.lengthInBytes}');
     return new Future.sync(() =>
-        new ByteData.view(data.buffer,
-                          data.offsetInBytes,
-                          data.lengthInBytes));
+        new ByteData.view(data.buffer, data.offsetInBytes, data.lengthInBytes));
   }
 }
 
 /// The [WebSocketVM] communicates with a Dart VM over WebSocket. The Dart VM
 /// can be embedded in Chromium or standalone. In the case of Chromium, we
 /// make the service requests via the Chrome Remote Debugging Protocol.
 class WebSocketVM extends CommonWebSocketVM {
   WebSocketVM(WebSocketVMTarget target) : super(target, new _IOWebSocket());
 }