Tag closures with their types

test/codegen/expect/dir/html_input_d.js

Index: test/codegen/expect/dir/html_input_d.js
diff --git a/test/codegen/expect/dir/html_input_d.js b/test/codegen/expect/dir/html_input_d.js
index b1c27b67ba9327113a1b7c28105e2b13e35c1ecb..f934b4d0514526e7135239b146ad2a6a6cadd808 100644
--- a/test/codegen/expect/dir/html_input_d.js
+++ b/test/codegen/expect/dir/html_input_d.js
@@ -1,10 +1,11 @@
 var html_input_d = dart.defineLibrary(html_input_d, {});
-(function(exports) {
+var core = dart.import(core);
+(function(exports, core) {
   'use strict';
-  // Function fib: (int) → int
   function fib(n) {
     return n == 0 || n == 1 ? 1 : dart.notNull(fib(dart.notNull(n) - 1)) + dart.notNull(fib(dart.notNull(n) - 2));
   }
+  dart.fn(fib, core.int, [core.int]);
   // Exports:
   exports.fib = fib;
-})(html_input_d);
+})(html_input_d, core);