dart2js cps: Support function types in 'is' and 'as' operators.

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index 0564bc5260269e03d09ad4af037c6b572c79305c..07f683f3ba2eac5bb308f80100fd3ad126983e00 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -135,8 +135,8 @@ class CodegenRegistry extends Registry {
     backend.registerTypeVariableBoundsSubtypeCheck(subtype, supertype);
   }
 
-  void registerClosureWithFreeTypeVariables(FunctionElement element) {
-    backend.registerClosureWithFreeTypeVariables(element, world, this);
+  void registerInstantiatedClosure(LocalFunctionElement element) {
+    backend.registerInstantiatedClosure(element, this);
   }
 
   void registerGetOfStaticFunction(FunctionElement element) {