Rename blahHandler to onBlah throughout dart:io.

runtime/bin/stream_util.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.
 
 class _BaseDataInputStream {
   abstract int available();
 
   List<int> read([int len]) {
     if (_closeCallbackCalled) return null;
     int bytesToRead = available();
@@ skipping 25 matching lines @@
   }
 
   void close() {
     _cancelScheduledDataCallback();
     _close();
     _checkScheduleCallbacks();
   }
 
   bool get closed() => _closeCallbackCalled;
 
-  void set dataHandler(void callback()) {
+  void set onData(void callback()) {
     _clientDataHandler = callback;
     _checkScheduleCallbacks();
   }
 
-  void set closeHandler(void callback()) {
+  void set onClosed(void callback()) {
     _clientCloseHandler = callback;
     _checkScheduleCallbacks();
   }
 
-  void set errorHandler(void callback()) {
+  void set onError(void callback()) {
     _clientErrorHandler = callback;
   }
 
   abstract List<int> _read(int bytesToRead);
 
   void _dataReceived() {
     // More data has been received asynchronously. Perform the data
     // handler callback now.
     _cancelScheduledDataCallback();
     if (_clientDataHandler !== null) {
@@ skipping 76 matching lines @@
   Function pipeDataHandler;
   Function pipeCloseHandler;
   Function pipeNoPendingWriteHandler;
 
   Function _inputCloseHandler;
 
   pipeDataHandler = () {
     List<int> data;
     while ((data = input.read()) !== null) {
       if (!output.write(data)) {
-        input.dataHandler = null;
-        output.noPendingWriteHandler = pipeNoPendingWriteHandler;
+        input.onData = null;
+        output.onNoPendingWrites = pipeNoPendingWriteHandler;
         break;
       }
     }
   };
 
   pipeCloseHandler = () {
     if (close) output.close();
     if (_inputCloseHandler !== null) {
       _inputCloseHandler();
     }
   };
 
   pipeNoPendingWriteHandler = () {
-    input.dataHandler = pipeDataHandler;
-    output.noPendingWriteHandler = null;
+    input.onData = pipeDataHandler;
+    output.onNoPendingWrites = null;
   };
 
   _inputCloseHandler = input._clientCloseHandler;
-  input.dataHandler = pipeDataHandler;
-  input.closeHandler = pipeCloseHandler;
-  output.noPendingWriteHandler = null;
+  input.onData = pipeDataHandler;
+  input.onClosed = pipeCloseHandler;
+  output.onNoPendingWrites = null;
 }