Merge IO v2 branch to bleeding edge

tests/standalone/io/process_stderr_test.dart

 // Copyright (c) 2012, 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.
 //
 // Process test program to test process communication.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
 import "process_test_util.dart";
 
 void test(Future<Process> future, int expectedExitCode) {
   future.then((process) {
-    process.onExit = (exitCode) {
+    process.exitCode.then((exitCode) {
       Expect.equals(expectedExitCode, exitCode);
-    };
+    });
 
     List<int> data = "ABCDEFGHI\n".charCodes;
     final int dataSize = data.length;
 
-    InputStream err = process.stderr;
-
     int received = 0;
     List<int> buffer = [];
 
-    void readData() {
-      buffer.addAll(err.read());
+    void readData(data) {
+      buffer.addAll(data);
       for (int i = received;
            i < min(data.length, buffer.length) - 1;
            i++) {
         Expect.equals(data[i], buffer[i]);
       }
       received = buffer.length;
       if (received >= dataSize) {
         // We expect an extra character on windows due to carriage return.
         if (13 == buffer[dataSize - 1] && dataSize + 1 == received) {
           Expect.equals(13, buffer[dataSize - 1]);
           Expect.equals(10, buffer[dataSize]);
           buffer.removeLast();
         }
       }
     }
 
-    process.stdout.onData = process.stdout.read;
-    process.stdin.write(data);
+    process.stdout.listen((_) {});
+    process.stdin.add(data);
     process.stdin.close();
-    err.onData = readData;
+    process.stderr.listen(readData);
   });
 }
 
 main() {
   // Run the test using the process_test binary.
   test(Process.start(getProcessTestFileName(),
                      const ["1", "1", "99", "0"]), 99);
 
   // Run the test using the dart binary with an echo script.
   // The test runner can be run from either the root or from runtime.
   var scriptFile = new File("tests/standalone/io/process_std_io_script.dart");
   if (!scriptFile.existsSync()) {
     scriptFile = new File("../tests/standalone/io/process_std_io_script.dart");
   }
   Expect.isTrue(scriptFile.existsSync());
   test(Process.start(new Options().executable, [scriptFile.name, "1"]), 0);
 }