Remove old isolate API and update all code in the repository to use

tests/standalone/io/stream_pipe_test.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.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 #import("dart:io");
@@ skipping 50 matching lines @@
 //  3. Creates a temp file.
 //  4. Pipes the socket output stream to the temp file.
 //  5. Expects the original file and the temp file to be equal.
 class PipeServerGame {
   int count = 0;
 
   PipeServerGame.start()
       : _receivePort = new ReceivePort(),
         _sendPort = null,
         _messages = 0 {
-    new PipeServer().spawn().then((SendPort port) {
-      _sendPort = port;
-      start();
-    });
+    _sendPort = spawnFunction(startPipeServer);
+    start();
   }
 
   void runTest() {
 
     void connectHandler() {
       String srcFileName =
           getDataFilename("tests/standalone/io/readline_test1.dat");
 
       SocketOutputStream socketOutput = _socket.outputStream;
       InputStream fileInput = new File(srcFileName).openInputStream();
@@ skipping 55 matching lines @@
   }
 
   int _port;
   ReceivePort _receivePort;
   SendPort _sendPort;
   Socket _socket;
   int _messages;
 }
 
 
+void startPipeServer() {
+  var server = new PipeServer();
+  port.receive(server.dispatch);
+}
+
+
 // The testing server will simply pipe each connecting sockets input
 // stream to its output stream.
 class PipeServer extends TestingServer {
   void onConnection(Socket connection) {
     connection.onError = (Exception e) { Expect.fail("Socket error $e"); };
     connection.inputStream.pipe(connection.outputStream);
   }
 }
 
 
@@ skipping 121 matching lines @@
   srcStream.pipe(dstStream, close: false);
 }
 
 
 main() {
   testFileToFilePipe1();
   testFileToFilePipe2();
   testFileToFilePipe3();
   PipeServerGame echoServerGame = new PipeServerGame.start();
 }