Encode super calls via extra properties on prototypes.

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

Index: pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
index 802887d9b73b5bb69d124378c73a37b1a6fa380f..6fa8fa44b0f86b69b7404c1edc2ad2e3489e6053 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/container_builder.dart
@@ -414,7 +414,7 @@ class ContainerBuilder extends CodeEmitterHelper {
 
   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;
@@ -427,6 +427,13 @@ class ContainerBuilder extends CodeEmitterHelper {
 
     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));