Add support for super aliases to new emitter.

pkg/compiler/lib/src/js_emitter/program_builder.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder.dart b/pkg/compiler/lib/src/js_emitter/program_builder.dart
index ccafbf53c769f4667d93c14fac988cca8faa5215..1ab9c2f308d49d555b61487b72e6860ef2b8fe3d 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder.dart
@@ -427,7 +427,10 @@ class ProgramBuilder {
     final bool needsStubs = _methodNeedsStubs(element);
     final bool canBeReflected = _methodCanBeReflected(element);
     final bool canBeApplied = _methodCanBeApplied(element);
-    final bool hasSuperAlias = backend.isAliasedSuperMember(element);
+    String superAlias;
+    if (backend.isAliasedSuperMember(element)) {
+      superAlias = namer.getNameOfAliasedSuperMember(element);
+    }
 
     if (isNotApplyTarget) {
       canTearOff = false;
@@ -466,7 +469,7 @@ class ProgramBuilder {
     return new InstanceMethod(element, name, code, adapters, callName,
         needsTearOff: canTearOff,
         tearOffName: tearOffName, isClosure: isClosure,
-        hasSuperAlias: hasSuperAlias, canBeApplied: canBeApplied,
+        superAlias: superAlias, canBeApplied: canBeApplied,
         canBeReflected: canBeReflected, needsStubs: needsStubs);
   }