Change the process API to be completely asynchronous.

samples/total/src/TotalRunner.dart

 #!/usr/bin/env dart
 // Copyright (c) 2011, 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");
 
 typedef void ExitCallback(int status, String exitString);
 
 void main() {
@@ skipping 21 matching lines @@
   String _serverMain;
 
   // TODO: Release or Debug? We should be able to find automatically
   static final DART_EXEC_PATH = '../../../out/Release_ia32/dart';
   static final CR = 0x0d;
   static final LF = 0x0a;
 
   ServerRunner(String this._serverMain);
 
   void run(ExitCallback exitCallback) {
-    Process dart = new Process(DART_EXEC_PATH, [_serverMain]);
+    Process dart = new Process.start(DART_EXEC_PATH, [_serverMain]);
 
     dart.exitHandler = (int status) {
-        dart.close();
-        exitCallback(status, this);
-      };
-
-    dart.start();
+      dart.close();
+      exitCallback(status, this);
+    };
 
     dart.stdout.dataHandler = () => readMore(dart.stdout, new StringBuffer());
     dart.stderr.dataHandler = () => 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);
           }
         }
       });
   }
 }