Change core lib, dart2js, and more for new optional parameters syntax

tests/isolate/count_test.dart

Index: tests/isolate/count_test.dart
===================================================================
--- tests/isolate/count_test.dart	(revision 13683)
+++ tests/isolate/count_test.dart	(working copy)
@@ -40,7 +40,7 @@
       if (count == 10) {
         remote.send(-1, reply);
       }
-    }, count: 11));
+    }, 11));
     remote.send(count++, reply);
   });
 }