Rename blahHandler to onBlah throughout dart:io.

tests/standalone/src/ProcessStderrTest.dart

Index: tests/standalone/src/ProcessStderrTest.dart
diff --git a/tests/standalone/src/ProcessStderrTest.dart b/tests/standalone/src/ProcessStderrTest.dart
index dbdb773f6fd8c30b5e8ab82cb7a09fc83235abd0..6d75ede8b7752e0614a2a20c92325b7365831c4f 100644
--- a/tests/standalone/src/ProcessStderrTest.dart
+++ b/tests/standalone/src/ProcessStderrTest.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 //
@@ -15,7 +15,7 @@
 
 void test(Process process, int expectedExitCode) {
   // Wait for the process to start and then interact with it.
-  process.startHandler = () {
+  process.onStart = () {
     List<int> data = "ABCDEFGHI\n".charCodes();
     final int dataSize = data.length;
 
@@ -48,10 +48,10 @@ void test(Process process, int expectedExitCode) {
 
     output.write(data);
     output.close();
-    input.dataHandler = readData;
+    input.onData = readData;
   };
 
-  process.exitHandler = (exitCode) {
+  process.onExit = (exitCode) {
     Expect.equals(expectedExitCode, exitCode);
   };
 }