Rename blahHandler to onBlah throughout dart:io.

tests/standalone/src/EchoServerTest.dart

-// 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.
 //
 // Echo server test program for testing sockets.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
@@ skipping 38 matching lines @@
       int bytesRead = 0;
 
       void handleRead() {
         bytesRead += _socket.readList(
             bufferReceived, bytesRead, MSGSIZE - bytesRead);
         if (bytesRead < MSGSIZE) {
           // We check every time the whole buffer to verify data integrity.
           for (int i = 0; i < bytesRead; i++) {
             Expect.equals(FIRSTCHAR + i, bufferReceived[i]);
           }
-          _socket.dataHandler = handleRead;
+          _socket.onData = handleRead;
         } else {
           // We check every time the whole buffer to verify data integrity.
           for (int i = 0; i < MSGSIZE; i++) {
             Expect.equals(FIRSTCHAR + i, bufferReceived[i]);
           }
           _messages++;
           _socket.close();
           if (_messages < MESSAGES) {
             sendData();
           } else {
@@ skipping 11 matching lines @@
 
     void connectHandler() {
 
       void writeMessage() {
         int bytesWritten = 0;
 
         void handleWrite() {
           bytesWritten += _socket.writeList(
               _buffer, bytesWritten, MSGSIZE - bytesWritten);
           if (bytesWritten < MSGSIZE) {
-            _socket.writeHandler = handleWrite;
+            _socket.onWrite = handleWrite;
           }
         }
 
         handleWrite();
       }
 
-      _socket.dataHandler = messageHandler;
-      _socket.errorHandler = errorHandler;
+      _socket.onData = messageHandler;
+      _socket.onError = errorHandler;
       writeMessage();
     }
 
     _socket = new Socket(TestingServer.HOST, _port);
     if (_socket !== null) {
-      _socket.connectHandler = connectHandler;
+      _socket.onConnect = connectHandler;
     } else {
       Expect.fail("Socket creation failed");
     }
   }
 
   void start() {
     _receivePort.receive((var message, SendPort replyTo) {
       _port = message;
       sendData();
     });
@@ skipping 25 matching lines @@
 
       void handleRead() {
         int read = connection.readList(buffer, bytesRead, msgSize - bytesRead);
         if (read > 0) {
           bytesRead += read;
           if (bytesRead < msgSize) {
             // We check every time the whole buffer to verify data integrity.
             for (int i = 0; i < bytesRead; i++) {
               Expect.equals(EchoServerGame.FIRSTCHAR + i, buffer[i]);
             }
-            connection.dataHandler = handleRead;
+            connection.onData = handleRead;
           } else {
             // We check every time the whole buffer to verify data integrity.
             for (int i = 0; i < msgSize; i++) {
               Expect.equals(EchoServerGame.FIRSTCHAR + i, buffer[i]);
             }
 
             void writeMessage() {
 
               int bytesWritten = 0;
 
               void handleWrite() {
                 int written = connection.writeList(
                     buffer, bytesWritten, msgSize - bytesWritten);
                 bytesWritten += written;
                 if (bytesWritten < msgSize) {
-                  connection.writeHandler = handleWrite;
+                  connection.onWrite = handleWrite;
                 } else {
                   connection.close(true);
                 }
               }
               handleWrite();
             }
             writeMessage();
           }
         }
       }
 
       handleRead();
     }
 
     void closeHandler() {
       connection.close();
     }
 
     void errorHandler() {
       Expect.fail("Socket error");
     }
 
-    connection.dataHandler = messageHandler;
-    connection.closeHandler = closeHandler;
-    connection.errorHandler = errorHandler;
+    connection.onData = messageHandler;
+    connection.onClosed = closeHandler;
+    connection.onError = errorHandler;
   }
 }
 
 main() {
   EchoServerTest.testMain();
 }