isolates refactor: this change introduces 'dart:isolate' as a library. This is a

tests/isolate/src/StaticStateTest.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("StaticStateTest");
+#import("dart:isolate");
 #import("TestFramework.dart");
 
 class TestIsolate extends Isolate {
 
   TestIsolate() : super();
 
   void main() {
     Expect.equals(null, state);
     this.port.receive((var message, SendPort replyTo) {
       String old = state;
@@ skipping 25 matching lines @@
         Expect.equals("bar", reply);
         expect.succeeded();
       }));
     }));
   });
 }
 
 void main() {
   runTests([test]);
 }