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

tests/isolate/src/SerializationTest.dart

Index: tests/isolate/src/SerializationTest.dart
diff --git a/tests/isolate/src/SerializationTest.dart b/tests/isolate/src/SerializationTest.dart
index 0f71af7731220773c44356bc1b43052e9bbf1fb3..6e0acfac76eed3f14fd088b4a8c1c88245e63ce0 100644
--- a/tests/isolate/src/SerializationTest.dart
+++ b/tests/isolate/src/SerializationTest.dart
@@ -9,18 +9,19 @@
 // Serialization test.
 // ---------------------------------------------------------------------------
 #library('SerializationTest');
-#import("dart:coreimpl");
+#import("dart:isolate");
+#import("../../../lib/isolate/frog/messages.dart");
 
 main() {
-  testAllTypes(copy);
-  testAllTypes(serialize);
+  testAllTypes(_copy);
+  testAllTypes(_serialize);
 }
 
-copy(x) {
+_copy(x) {
   return new Copier().traverse(x);
 }
 
-serialize(x) {
+_serialize(x) {
   Serializer serializer = new Serializer();
   Deserializer deserializer = new Deserializer();
   return deserializer.deserialize(serializer.traverse(x));