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

frog/lib/corelib.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:core");
 #import("dart:coreimpl");
 
 // TODO(jimhug): Better way to map in standard corelib
 #source("../../corelib/src/bool.dart");
 #source("../../corelib/src/collection.dart");
 #source("../../corelib/src/comparable.dart");
 #source("../../corelib/src/date.dart");
 #source("../../corelib/src/double.dart");
 #source("../../corelib/src/duration.dart");
 #source("../../corelib/src/exceptions.dart");
 #source("../../corelib/src/expect.dart");
 #source("../../corelib/src/function.dart");
 #source("../../corelib/src/future.dart");
 #source("../../corelib/src/hashable.dart");
 #source("../../corelib/src/int.dart");
-#source("../../corelib/src/isolate.dart");
 #source("../../corelib/src/iterable.dart");
 #source("../../corelib/src/iterator.dart");
 #source("../../corelib/src/list.dart");
 #source("../../corelib/src/map.dart");
 #source("math.dart"); // overriden to be more directly native
 #source("natives.dart"); // native helpers generated by the compiler
-#source("newisolate.dart"); // work in progress towards the new API
 #source("num.dart"); // overriden to include int members on num - weird typing
 #source("../../corelib/src/options.dart");
 #source("../../corelib/src/pattern.dart");
 #source("../../corelib/src/queue.dart");
 #source("../../corelib/src/regexp.dart");
 #source("../../corelib/src/set.dart");
 #source("../../corelib/src/stopwatch.dart");
 #source("../../corelib/src/string.dart");
 #source("../../corelib/src/strings.dart");
 #source("../../corelib/src/string_buffer.dart");
@@ skipping 87 matching lines @@
   // TODO(jmesserly): add named args. For now stay compatible with the VM.
   noSuchMethod(String name, List args) {
     throw new NoSuchMethodException(this, name, args);
   }
 }
 
 void _assert(var test, String text, String url, int line, int column) {
   if (test is Function) test = test();
   if (!test) throw new AssertionError._internal(text, url, line, column);
 }