Add support for super aliases to new emitter.

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

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.new_js_emitter.model;
 
 import '../js/js.dart' as js show Expression;
 import '../constants/values.dart' show ConstantValue;
 
 import '../deferred_load.dart' show OutputUnit;
@@ skipping 341 matching lines @@
     assert(needsTearOff != null);
     assert(!needsTearOff || tearOffName != null);
     assert(canBeApplied != null);
     assert(canBeReflected != null);
     assert(needsStubs != null);
   }
 }
 
 class InstanceMethod extends DartMethod {
   // TODO(herhut): Directly store aliases instead.
-  final bool hasSuperAlias;
+  final String superAlias;

[floitsch, 2015/01/30 18:31:05]

Explain what this is, and what the emitter has to do with it.

   final bool isClosure;
 
   InstanceMethod(Element element, String name, js.Expression code,
                  List<AdapterStubMethod> adapterStubs,
                  String callName,
                  {bool needsTearOff,
                   String tearOffName,
-                  this.hasSuperAlias,
+                  this.superAlias,
                   bool canBeApplied,
                   bool canBeReflected,
                   this.isClosure,
                   bool needsStubs})
       : super(element, name, code, adapterStubs, callName,
               needsTearOff: needsTearOff,
               tearOffName: tearOffName,
               canBeApplied: canBeApplied,
               canBeReflected: canBeReflected,
               needsStubs: needsStubs) {
-    assert(hasSuperAlias != null);
     assert(isClosure != null);
   }
 }
 
 /// A method that is generated by the backend and has not direct correspondence
 /// to a method in the original Dart program. Examples are getter and setter
 /// stubs and stubs to dispatch calls to methods with optional parameters.
 class StubMethod extends Method {
   StubMethod(String name, js.Expression code,
              {Element element})
@@ skipping 39 matching lines @@
               canBeApplied : canBeApplied,
               canBeReflected : canBeReflected,
               needsStubs : needsStubs);
 }
 
 class StaticStubMethod extends StubMethod implements StaticMethod {
   Holder holder;
   StaticStubMethod(String name, this.holder, js.Expression code)
       : super(name, code);
 }