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

tests/standalone/io/socket_many_connections_test.dart

Index: tests/standalone/io/socket_many_connections_test.dart
diff --git a/tests/standalone/io/socket_many_connections_test.dart b/tests/standalone/io/socket_many_connections_test.dart
index b536401e7825c26c6c89c686a7c06d4beddb2cd8..98e05cddf3cf6e5b3b3a7b0030697ecaf8bb6de7 100644
--- a/tests/standalone/io/socket_many_connections_test.dart
+++ b/tests/standalone/io/socket_many_connections_test.dart
@@ -17,10 +17,8 @@ class SocketManyConnectionsTest {
         _sendPort = null,
         _connections = 0,
         _sockets = new List<Socket>(CONNECTIONS) {
-    new TestServer().spawn().then((SendPort port) {
-      _sendPort = port;
-      start();
-    });
+    _sendPort = spawnFunction(startTestServer);
+    start();
   }
 
   void run() {
@@ -65,6 +63,12 @@ class SocketManyConnectionsTest {
   int _connections;
 }
 
+
+void startTestServer() {
+  var server = new TestServer();
+  port.receive(server.dispatch);
+}
+
 class TestServer extends TestingServer {
 
   void onConnection(Socket connection) {