Rename blahHandler to onBlah throughout dart:io.

tests/standalone/src/ProcessSegfaultTest.dart

Index: tests/standalone/src/ProcessSegfaultTest.dart
diff --git a/tests/standalone/src/ProcessSegfaultTest.dart b/tests/standalone/src/ProcessSegfaultTest.dart
index cb38eba8040d1fc625792d99b4f0330b77b467c2..5d27eb382e07ba73e3b26c4ad03ac5982fe5557b 100644
--- a/tests/standalone/src/ProcessSegfaultTest.dart
+++ b/tests/standalone/src/ProcessSegfaultTest.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.
 //
@@ -13,7 +13,7 @@ class ProcessSegfaultTest {
     Process process = new Process.start(getProcessTestFileName(),
                                         const ["0", "0", "1", "1"]);
 
-    process.exitHandler = (int exitCode) {
+    process.onExit = (int exitCode) {
       process.close();
     };
   }