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

tests/standalone/io/stream_pipe_test.dart

Index: tests/standalone/io/stream_pipe_test.dart
diff --git a/tests/standalone/io/stream_pipe_test.dart b/tests/standalone/io/stream_pipe_test.dart
index 84dc0d064db2bb27203d2e937af0f677f15ccfb3..6f77e4650c3ae065a8da983b63b5bf39da104b53 100644
--- a/tests/standalone/io/stream_pipe_test.dart
+++ b/tests/standalone/io/stream_pipe_test.dart
@@ -68,10 +68,8 @@ class PipeServerGame {
       : _receivePort = new ReceivePort(),
         _sendPort = null,
         _messages = 0 {
-    new PipeServer().spawn().then((SendPort port) {
-      _sendPort = port;
-      start();
-    });
+    _sendPort = spawnFunction(startPipeServer);
+    start();
   }
 
   void runTest() {
@@ -147,6 +145,12 @@ class PipeServerGame {
 }
 
 
+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 {