Rename blahHandler to onBlah throughout dart:io.

runtime/bin/output_stream.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.
 
 /**
  * Output streams are used to write data sequentially to a data
  * destination e.g. a connected socket or an open file.
  *
  * An output stream provides internal buffering of the data written
  * through all calls to [write] and [writeFrom] if data cannot be
  * written immediately to the communication channel. The callback set
- * through [noPendingWriteHandler] can be used to to keep the rate of
+ * through [onNoPendingWrites] can be used to to keep the rate of
  * writing in sync with the rate the system can actually write data to
  * the underlying communication channel.
  */
 interface OutputStream {
   /**
    * Writes the content of [buffer] to the stream. If [copyBuffer] is
    * false ownership of the specified buffer is passed to the system
    * and the caller should not change it afterwards. The default value
    * for [copyBuffer] is true.
    *
@@ skipping 29 matching lines @@
    * data.
    */
   void destroy();
 
   /**
    * Sets the handler that gets called when the internal OS buffers
    * have been flushed. This callback can be used to keep the rate of
    * writing in sync with the rate the system can write data to the
    * underlying communication channel.
    */
-  void set noPendingWriteHandler(void callback());
+  void set onNoPendingWrites(void callback());
 
   /**
    * Sets the handler that gets called when the underlying
    * communication channel has been closed and no more data can be
    * send.
    */
-  void set closeHandler(void callback());
+  void set onClosed(void callback());
 
   /**
    * Sets the handler that gets called when the underlying
    * communication channel gets into some kind of error situation.
    */
-  void set errorHandler(void callback());
+  void set onError(void callback());
 }