implement tear offs

test/codegen/expect/methods.js

Index: test/codegen/expect/methods.js
diff --git a/test/codegen/expect/methods.js b/test/codegen/expect/methods.js
index 708b0ce457c45f68eb0864161f508121862d41f6..87611b28f46ae68001dd5b444540fe235628c2d7 100644
--- a/test/codegen/expect/methods.js
+++ b/test/codegen/expect/methods.js
@@ -54,7 +54,7 @@ var methods;
   // Function test: () → dynamic
   function test() {
     let f = new Foo();
-    dart.dsend(f, 'bar', "Bar's call method!");
+    dart.dcall(f.bar, "Bar's call method!");
   }
   // Exports:
   exports.A = A;