Encode super calls via extra properties on prototypes.

pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart

 // Copyright (c) 2013, 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.
 
 part of dart2js.js_emitter;
 
 /// This class should morph into something that makes it easy to build
 /// JavaScript representations of libraries, class-sides, and instance-sides.
 /// Initially, it is just a placeholder for code that is moved from
 /// [CodeEmitterTask].
@@ skipping 396 matching lines @@
         isClosure: isClosure,
         tearOffName: tearOffName,
         canBeReflected: canBeReflected,
         canBeApplied: canBeApplied,
         needStructuredInfo: needStructuredInfo);
 
   }
 
   void addMemberMethodFromInfo(MemberInfo info, ClassBuilder builder) {
     final FunctionElement member = info.member;
-    final String name = info.name;
+    String name = info.name;
     final FunctionSignature parameters = info.parameters;
     jsAst.Expression code = info.code;
     final bool needsStubs = info.needsStubs;
     final bool canTearOff = info.canTearOff;
     final bool isClosure = info.isClosure;
     final String tearOffName = info.tearOffName;
     final bool canBeReflected = info.canBeReflected;
     final bool canBeApplied = info.canBeApplied;
     final bool needStructuredInfo = info.needStructuredInfo;
 
     emitter.interceptorEmitter.recordMangledNameOfMemberMethod(member, name);
 
+    // If this member is called from a subclass via super, we have to add a
+    // renaming. This is encoded by using two names separated with a : as
+    // the property name.
+    if (backend.isAliasedSuperMember(member)) {
+      name = "$name:${namer.getNameOfAliasedSuperMember(member)}";

[floitsch, 2014/11/24 10:47:52]

Too far away from the code that extracts it.
Try to move them closer together.

[ahe, 2014/11/25 09:33:03]

I'm concerned that using ':' (colon) here is likely to create hard to debug
bugs. The mirrors library already uses colons in names.

I suggest that you add this information to the "structured info" array computed
below.

[herhut, 2014/11/25 14:03:19]

This has been removed.

[herhut, 2014/11/25 14:03:19]

Done.

+    }
+
     if (!needStructuredInfo) {
       compiler.dumpInfoTask.registerElementAst(member,
           builder.addProperty(name, code));
       if (needsStubs) {
         addParameterStubs(
             member,
             (Selector selector, jsAst.Fun function) {
               compiler.dumpInfoTask.registerElementAst(member,
                   builder.addProperty(namer.invocationName(selector), function));

[floitsch, 2014/11/24 10:47:52]

long line.

[herhut, 2014/11/25 14:03:19]

Done.

             });
       }
       return;
     }
 
 
     // This element is needed for reflection or needs additional stubs. So we
     // need to retain additional information.
 
     // The information is stored in an array with this format:
@@ skipping 184 matching lines @@
     assert(code != null);
     assert(needsStubs != null);
     assert(canTearOff != null);
     assert(isClosure != null);
     assert(tearOffName != null || !canTearOff);
     assert(canBeReflected != null);
     assert(canBeApplied != null);
     assert(needStructuredInfo != null);
   }
 }