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

frog/lib/corelib_impl.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.
 
 #library("dart:coreimpl");
 
 #source("../../corelib/src/implementation/dual_pivot_quicksort.dart");
 #source("../../corelib/src/implementation/duration_implementation.dart");
 #source("../../corelib/src/implementation/exceptions.dart");
 #source("../../corelib/src/implementation/future_implementation.dart");
 #source("../../corelib/src/implementation/hash_map_set.dart");
 // TODO(jimhug): Re-explore tradeoffs with using builtin JS maps.
 #source("../../corelib/src/implementation/linked_hash_map.dart");
 #source("../../corelib/src/implementation/maps.dart");
 #source("../../corelib/src/implementation/options.dart");
 #source("../../corelib/src/implementation/queue.dart");
 #source("../../corelib/src/implementation/stopwatch_implementation.dart");
 #source("../../corelib/src/implementation/splay_tree.dart");
 
 #source("string_buffer.dart");
 #source("string_base.dart");
 #source("string_implementation.dart");
 #source("arrays.dart");
 #source("collections.dart");
 #source("date_implementation.dart");
 
-#source("isolate.dart");
-#source("isolate_serialization.dart");
-
 #source("function_implementation.dart");
 
 /**
  * The default implementation of the [List<E>] interface. Essentially a growable
  * array that will expand automatically as more elements are added.
  */
 class ListFactory<E> implements List<E> native "Array" {
   ListFactory([int length]) native;
 
   // TODO(jmesserly): type parameters aren't working here
@@ skipping 483 matching lines @@
     } else if (isNaN()) {
       if (other.isNaN()) {
         return 0;
       }
       return 1;
     } else {
       return -1;
     }
   }
 }