Rename blahHandler to onBlah throughout dart:io.

samples/total/server/TotalRunner.dart

 #!/usr/bin/env 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.
 
 #library("total:runner");
 
 #import('dart:io');
 
 typedef void ExitCallback(int status, String exitString);
@@ skipping 38 matching lines @@
         foundExec = dartExec;
       }
     }
     if (foundExec == null) {
       print("No executable found on DART_EXECS:\n" + DART_EXECS);
       exitCallback(1, this);
       return;      
     }
     Process dart = new Process.start(foundExec, [_serverMain]);
 
-    dart.exitHandler = (int status) {
+    dart.onExit = (int status) {
       dart.close();
       exitCallback(status, this);
     };
 
-    dart.stdout.dataHandler = () => readMore(dart.stdout, new StringBuffer());
-    dart.stderr.dataHandler = () => readMore(dart.stderr, new StringBuffer());
+    dart.stdout.onData = () => readMore(dart.stdout, new StringBuffer());
+    dart.stderr.onData = () => readMore(dart.stderr, new StringBuffer());
   }
 
   void readMore(InputStream i, StringBuffer readSoFar) {
     while(i.available() != 0) {
       processBuffer(i.read(), readSoFar);
     }
   }
 
   void processBuffer(List<int> buf, StringBuffer readSoFar) {
     buf.forEach((int i) {
         if (i != CR && i != LF) {
           readSoFar.add(new String.fromCharCodes([i]));
         } else {
           String line = readSoFar.toString();
           readSoFar.clear();
           if (line.length != 0) {
             print(line);
           }
         }
       });
   }
 }