Implement reflecting on mixin applications.

dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart

 // Copyright (c) 2012, 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 js_backend;
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
@@ skipping 1353 matching lines @@
         }
       }
       String suffix =
           '$name:$requiredParameterCount:$optionalParameterCount'
           '$namedArguments';
       return (isConstructor) ? 'new $suffix' : suffix;
     }
     Element element = elementOrSelector;
     if (element.isGenerativeConstructorBody()) {
       return null;
+    } else if (element.isClass()) {
+      ClassElement cls = element;
+      if (cls.isUnnamedMixinApplication) return null;
+      return cls.name.slowToString();
     }
     throw compiler.internalErrorOnElement(
         element, 'Do not know how to reflect on this $element');
   }
 
   String namedParametersAsReflectionNames(Selector selector) {
     if (selector.orderedNamedArguments.isEmpty) return '';
     String names =
         selector.orderedNamedArguments.map((x) => x.slowToString()).join(':');
     return ':$names';
@@ skipping 590 matching lines @@
       builder.addProperty('static', new jsAst.Blob(statics));
     }
 
     // TODO(ahe): This method (generateClass) should return a jsAst.Expression.
     if (!buffer.isEmpty) {
       buffer.write(',$n$n');
     }
     buffer.write('$className:$_');
     buffer.write(jsAst.prettyPrint(builder.toObjectInitializer(), compiler));
     if (backend.shouldRetainName(classElement.name)) {
-      buffer.write(',$n$n"+${classElement.name.slowToString()}": 0');
-      recordedMangledNames.add(className);
+      String reflectionName = getReflectionName(classElement, className);
+      buffer.write(',$n$n"+$reflectionName": 0');
     }
   }
 
   bool get getterAndSetterCanBeImplementedByFieldSpec => true;
 
   /// If this is true then we can generate the noSuchMethod handlers at startup
   /// time, instead of them being emitted as part of the Object class.
   bool get generateTrivialNsmHandlers => true;
 
   int _selectorRank(Selector selector) {
@@ skipping 2074 matching lines @@
 
 const String HOOKS_API_USAGE = """
 // The code supports the following hooks:
 // dartPrint(message)   - if this function is defined it is called
 //                        instead of the Dart [print] method.
 // dartMainRunner(main) - if this function is defined, the Dart [main]
 //                        method will not be invoked directly.
 //                        Instead, a closure that will invoke [main] is
 //                        passed to [dartMainRunner].
 """;