Update Timer API to take the callback as the last parameter.

runtime/bin/process_impl.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 _ProcessStartStatus {
   int _errorCode;  // Set to OS error code if process start failed.
   String _errorMessage;  // Set to OS error message if process start failed.
 }
 
 
@@ skipping 29 matching lines @@
     _in = new _Socket._internalReadOnly();  // stdout coming from process.
     _out = new _Socket._internalWriteOnly();  // stdin going to process.
     _err = new _Socket._internalReadOnly();  // stderr coming from process.
     _exitHandler = new _Socket._internalReadOnly();
     _closed = false;
     _killed = false;
     _started = false;
     _onExit = null;
     // TODO(ager): Make the actual process starting really async instead of
     // simulating it with a timer.
-    new Timer((Timer ignore) => start(), 0);
+    new Timer(0, (Timer ignore) => start());
   }
 
   int _intFromBytes(List<int> bytes, int offset) {
     return (bytes[offset] +
             (bytes[offset + 1] << 8) +
             (bytes[offset + 2] << 16) +
             (bytes[offset + 3] << 24));
   }
 
   void start() {
@@ skipping 141 matching lines @@
   Socket _err;
   Socket _exitHandler;
   int _pid;
   bool _closed;
   bool _killed;
   bool _started;
   Function _onExit;
   Function _onError;
   Function _onStart;
 }