Handle super-method invocations in CPS->JS backend.

pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
index e18e01781df19fdd56e89370ee6e907aba3fc0bf..8c8183224abd29980f97a82ca2ff3789c0ebbcd0 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_nodes_sexpr.dart
@@ -131,11 +131,12 @@ class SExpressionStringifier extends Visitor<String> with Indentation {
     return '$indentation(InvokeMethod $rcv $name $args $cont)';
   }
 
-  String visitInvokeSuperMethod(InvokeSuperMethod node) {
+  String visitInvokeMethodDirectly(InvokeMethodDirectly node) {
+    String receiver = access(node.receiver);
     String name = node.selector.name;
     String cont = access(node.continuation);
     String args = formatArguments(node);
-    return '$indentation(InvokeSuperMethod $name $args $cont)';
+    return '$indentation(InvokeMethodDirectly $receiver $name $args $cont)';
   }
 
   String visitInvokeConstructor(InvokeConstructor node) {