Merge IO v2 branch to bleeding edge

pkg/webdriver/lib/webdriver.dart

 // Copyright (c) 2011, 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 webdriver;
 
 import 'dart:json' as json;
 import 'dart:uri';
 import 'dart:io';
 
@@ skipping 34 matching lines @@
  *    }).chain((_) {
  *      return session.submit(id);
  *    }).chain((_) {
  *      return session.close();
  *    }).then((_) {
  *      session = null;
  *    });
  */
 
 void writeStringToFile(String fileName, String contents) {
-  var file = new File(fileName);
-  var ostream = file.openOutputStream(FileMode.WRITE);
-  ostream.writeString(contents);
-  ostream.close();
+  new File(fileName).writeAsStringSync(contents);
 }
 
 void writeBytesToFile(String fileName, List<int> contents) {
-  var file = new File(fileName);
-  var ostream = file.openOutputStream(FileMode.WRITE);
-  ostream.write(contents);
-  ostream.close();
+  new File(fileName).writeAsBytesSync(contents);
 }
 
 class WebDriverError {
   static List _errorTypes = null;
   static List _errorDetails = null;
   int statusCode;
   String type;
   String message;
   String details;
   String results;
@@ skipping 1280 matching lines @@
    * Get the log for a given log type. Log buffer is reset after each request.
    * Each log entry is a [Map] with these fields:
    *
    * 'timestamp' (int) - The timestamp of the entry.
    * 'level' (String) - The log level of the entry, for example, "INFO".
    * 'message' (String) - The log message.
    */
   Future<List<Map>> getLogs(String type) =>
       _post('log', params: { 'type': type });
 }