Merge IO v2 branch to bleeding edge

tests/standalone/io/dart_std_io_pipe_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.
 //
 // Test a dart sub-process handling stdio with different types of
 // redirection.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
@@ skipping 24 matching lines @@
 
   // The shell script will run the dart executable passed with a
   // number of different redirections of stdio.
   String pipeOutFile = "${dir.path}/pipe";
   String redirectOutFile = "${dir.path}/redirect";
   String executable = new Options().executable;
   List args =
       [executable, dartScript, type, pipeOutFile, redirectOutFile];
   var future = Process.start(shellScript, args);
   future.then((process) {
-    process.onExit = (exitCode) {
+    process.exitCode.then((exitCode) {
       Expect.equals(0, exitCode);
 
       // Check the expected file contents.
       if (type == "0") {
         checkFileContent("${pipeOutFile}", "Hello\n");
         checkFileEmpty("${redirectOutFile}.stderr");
         checkFileContent("${redirectOutFile}.stdout", "Hello\nHello\n");
       }
       if (type == "1") {
         checkFileContent("${pipeOutFile}", "Hello\n");
         checkFileEmpty("${redirectOutFile}.stdout");
         checkFileContent("${redirectOutFile}.stderr", "Hello\nHello\n");
       }
       if (type == "2") {
         checkFileContent("${pipeOutFile}", "Hello\nHello\n");
         checkFileContent("${redirectOutFile}.stdout",
                          "Hello\nHello\nHello\nHello\n");
         checkFileContent("${redirectOutFile}.stderr",
                          "Hello\nHello\nHello\nHello\n");
       }
 
       // Cleanup test directory.
       dir.deleteSync(recursive: true);
-    };
+    });
     // Drain out and err streams so they close.
-    process.stdout.onData = process.stdout.read;
-    process.stderr.onData = process.stderr.read;
+    process.stdout.listen((_) {});
+    process.stderr.listen((_) {});
   });
   future.catchError((error) {
     dir.deleteSync(recursive: true);
     Expect.fail(error.error.toString());
   });
 }
 
 // This tests that the Dart standalone VM can handle piping to stdin
 // and can pipe to stdout.
 main() {
@@ skipping 11 matching lines @@
   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");
   }
 
   // Run the shell script.
   test(shellScript.name, scriptFile.name, "0");
   test(shellScript.name, scriptFile.name, "1");
   test(shellScript.name, scriptFile.name, "2");
 }