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

tests/isolate/spawn_test.dart

Index: tests/isolate/spawn_test.dart
diff --git a/tests/isolate/spawn_test.dart b/tests/isolate/spawn_test.dart
index d5a98bf38639e120775619be32de686c5ac52f5f..899f28327ff0931a1982bb80d3adb457627b1643 100644
--- a/tests/isolate/spawn_test.dart
+++ b/tests/isolate/spawn_test.dart
@@ -1,4 +1,4 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
@@ -8,25 +8,17 @@
 
 main() {
   test("spawn a new isolate", () {
-    SpawnedIsolate isolate = new SpawnedIsolate();
-    isolate.spawn().then(expectAsync1((SendPort port) {
-      port.call(42).then(expectAsync1((message) {
-        Expect.equals(42, message);
-      }));
+    SendPort port = spawnFunction(entry);
+    port.call(42).then(expectAsync1((message) {
+      Expect.equals(42, message);
     }));
   });
 }
 
-class SpawnedIsolate extends Isolate {
-
-  SpawnedIsolate() : super() { }
-
-  void main() {
-    this.port.receive((message, SendPort replyTo) {
-      Expect.equals(42, message);
-      replyTo.send(42, null);
-      this.port.close();
-    });
-  }
-
+void entry() {
+  port.receive((message, SendPort replyTo) {
+    Expect.equals(42, message);
+    replyTo.send(42, null);
+    port.close();
+  });
 }