Support type argument substitution on unnamed mixin applications.

sdk/lib/_internal/compiler/implementation/js_emitter/class_emitter.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;
 
 class ClassEmitter extends CodeEmitterHelper {
   /**
    * Documentation wanted -- johnniwinther
    *
@@ skipping 318 matching lines @@
 
     if (!statics.isEmpty) {
       classBuilder.addProperty('static', new jsAst.ObjectInitializer(statics));
     }
 
     // TODO(ahe): This method (generateClass) should return a jsAst.Expression.
     enclosingBuilder.addProperty(className, classBuilder.toObjectInitializer());
 
     String reflectionName = task.getReflectionName(classElement, className);
     if (reflectionName != null) {
+      reflectionName = '+$reflectionName';
+    } else if (classElement.isUnnamedMixinApplication &&
+               backend.isNeededForReflection(classElement)) {
+      reflectionName = '-$className';
+    }
+    if (reflectionName != null) {
       if (!backend.isNeededForReflection(classElement)) {
-        enclosingBuilder.addProperty("+$reflectionName", js.number(0));
+        enclosingBuilder.addProperty("$reflectionName", js.number(0));
       } else {
         List<int> types = new List<int>();
         if (classElement.supertype != null) {
           types.add(task.metadataEmitter.reifyType(classElement.supertype));
         }
         for (DartType interface in classElement.interfaces) {
           types.add(task.metadataEmitter.reifyType(interface));
         }
-        enclosingBuilder.addProperty("+$reflectionName",
+        enclosingBuilder.addProperty("$reflectionName",
             new jsAst.ArrayInitializer.from(types.map((typeNumber) =>
                 js.number(typeNumber))));
       }
     }
   }
 
   /**
    * Calls [addField] for each of the fields of [element].
    *
    * [element] must be a [ClassElement] or a [LibraryElement].
@@ skipping 232 matching lines @@
       computeTypeVariable =
           js(r'this.$builtinTypeInfo && this.$builtinTypeInfo[#]', index);
     }
     jsAst.Expression convertRtiToRuntimeType =
         namer.elementAccess(compiler.findHelper('convertRtiToRuntimeType'));
     builder.addProperty(
         name, js.fun(
             [], [js.return_(convertRtiToRuntimeType(computeTypeVariable))]));
   }
 }