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 317 matching lines @@
   final js.Expression code;
 
   Method(this.element, this.name, this.code);
 }
 
 /// A method that corresponds to a method in the original Dart program.
 class DartMethod extends Method {
   final bool needsTearOff;
   final String tearOffName;
   final List<ParameterStubMethod> parameterStubs;
-  // TODO(herhut): Directly store aliases instead.
   final bool canBeApplied;
   final bool canBeReflected;
 
   // If this method can be torn off, contains the name of the corresponding
   // call method. For example, for the member `foo$1$name` it would be
   // `call$1$name` (in unminified mode).
   final String callName;
 
   DartMethod(Element element, String name, js.Expression code,
              this.parameterStubs, this.callName,
              {this.needsTearOff, this.tearOffName, this.canBeApplied,
              this.canBeReflected})
       : super(element, name, code) {
     assert(needsTearOff != null);
     assert(!needsTearOff || tearOffName != null);
     assert(canBeApplied != null);
     assert(canBeReflected != null);
   }
 }
 
 class InstanceMethod extends DartMethod {
-  // TODO(herhut): Directly store aliases instead.
-  final bool hasSuperAlias;
+  /// An alternative name for this method. This is used to model calls to
+  /// a method via `super`. If [aliasName] is non-null, the emitter has to
+  /// ensure that this method is registered on the prototype under both [name]
+  /// and [aliasName].
+  final String aliasName;
   final bool isClosure;
 
+
   InstanceMethod(Element element, String name, js.Expression code,
                  List<ParameterStubMethod> parameterStubs,
                  String callName,
                  {bool needsTearOff,
                   String tearOffName,
-                  this.hasSuperAlias,
+                  this.aliasName,
                   bool canBeApplied,
                   bool canBeReflected,
        this.isClosure})
       : super(element, name, code, parameterStubs, callName,
               needsTearOff: needsTearOff,
               tearOffName: tearOffName,
               canBeApplied: canBeApplied,
               canBeReflected: canBeReflected) {
-    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 38 matching lines @@
               tearOffName : tearOffName,
               canBeApplied : canBeApplied,
               canBeReflected : canBeReflected);
 }
 
 class StaticStubMethod extends StubMethod implements StaticMethod {
   Holder holder;
   StaticStubMethod(String name, this.holder, js.Expression code)
       : super(name, code);
 }