Encode super calls via extra properties on prototypes.

sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/emitter.dart

Index: sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/emitter.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/emitter.dart b/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/emitter.dart
index 6c266153502120b97a67edcb207ad9877eaddfc2..0a4eea8fa1a12bcdd43dda03841b4814886277c4 100644
--- a/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/emitter.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/emitter.dart
@@ -312,9 +312,16 @@ class OldEmitter implements Emitter {
             tmp.prototype = superConstructor.prototype;
             var object = new tmp();
             var properties = constructor.prototype;
-            for (var member in properties)
-              if (hasOwnProperty.call(properties, member))
-                object[member] = properties[member];
+            for (var member in properties) {
+              if (hasOwnProperty.call(properties, member)) {
+                var s = member.split(':');
+                if (s.length > 1) {
+                  object[s[0]] = object[s[1]] = properties[member];
+                } else {
+                  object[member] = properties[member];
+                }
+              }
+            }
             object.constructor = constructor;
             constructor.prototype = object;
             return object;
@@ -373,8 +380,8 @@ class OldEmitter implements Emitter {
           if (desc instanceof Array) desc = desc[1];
 
           /* The 'fields' are either a constructor function or a
-           * string encoding fields, constructor and superclass.  Get
-           * the superclass and the fields in the format
+           * string encoding fields, constructor and superclass. Get the

[floitsch, 2014/11/04 13:35:21]

Gets

[herhut, 2014/11/04 13:55:37]

Done.

+           * superclass and fields in the format
            *   '[name/]Super;field1,field2'
            * from the CLASS_DESCRIPTOR_PROPERTY property on the descriptor.
            * The 'name/' is optional and contains the name that should be used