Refactor runtime into libraries, better type reps

test/codegen/expect/8invalid-chars.in+file_name.js

Index: test/codegen/expect/8invalid-chars.in+file_name.js
diff --git a/test/codegen/expect/8invalid-chars.in+file_name.js b/test/codegen/expect/8invalid-chars.in+file_name.js
index 442e885d96b6d07d1ece7ddf143ded7a9628db01..1f7353f40d42c898893161429d9eb425a2474039 100644
--- a/test/codegen/expect/8invalid-chars.in+file_name.js
+++ b/test/codegen/expect/8invalid-chars.in+file_name.js
@@ -1,6 +1,8 @@
-dart.library('8invalid-chars.in+file_name', null, /* Imports */[
+loader.library('8invalid-chars.in+file_name', null, /* Imports */[
+  "dart/dart_runtime",
+  "dart/dartx"
 ], /* Lazy imports */[
-], function(exports) {
+], function(exports, dart, dartx) {
   'use strict';
   function main() {
   }