Store the aliasName of a method in the model.

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 298 matching lines @@
 }
 
 /**
  * A method that corresponds to a method in the original Dart program.
  */
 class DartMethod extends Method {
   final bool needsTearOff;
   final String tearOffName;
   // TODO(herhut): Directly store stubs instead/
   final bool needsStubs;
-  // TODO(herhut): Directly store aliases instead.
   final bool canBeApplied;
 
   DartMethod(Element element, String name, js.Expression code,
       {this.needsTearOff, this.tearOffName, this.needsStubs, this.canBeApplied})
       : super(element, name, code) {
     assert(needsTearOff != null);
     assert(!needsTearOff || tearOffName != null);
     assert(canBeApplied != null);
     assert(needsStubs != null);
   }
 }
 
 class InstanceMethod extends DartMethod {
-  // TODO(herhut): Directly store aliases instead.
-  final bool hasSuperAlias;
+  final String aliasName;

[floitsch, 2015/01/29 15:24:35]

Add documentation what this is.
When does it happen?
What does the emitter need to do with it?

[herhut, 2015/02/03 10:20:16]

Done.

   final bool isClosure;
 
   InstanceMethod(element, name, code,
       {bool needsTearOff,
        String tearOffName,
-       this.hasSuperAlias,
+       this.aliasName,
        bool canBeApplied,
        this.isClosure,
        bool needsStubs})
       : super(element, name, code,
               needsTearOff: needsTearOff,
               tearOffName: tearOffName,
               canBeApplied: canBeApplied,
               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 {
@@ skipping 12 matching lines @@
               tearOffName : tearOffName,
               canBeApplied : canBeApplied,
               needsStubs : needsStubs);
 }
 
 class StaticStubMethod extends StubMethod {
   Holder holder;
   StaticStubMethod(String name, this.holder, js.Expression code)
       : super(name, code);
 }