Ensure that unmangled private names are unique.

sdk/lib/_internal/compiler/implementation/js_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 517 matching lines @@
       });
     }
     if (canBeReflected) {
       jsAst.LiteralString reflectionName;
       if (member.isConstructor) {
         String reflectionNameString = task.getReflectionName(member, name);
         reflectionName =
             new jsAst.LiteralString(
                 '"new ${Elements.reconstructConstructorName(member)}"');
       } else {
-        reflectionName = js.string(member.name);
+        reflectionName =
+            js.string(namer.privateName(member.library, member.name));
       }
       expressions
           ..add(reflectionName)
           ..addAll(task.metadataEmitter.computeMetadata(member).map(js.number));
     } else if (isClosure && canBeApplied) {
-      expressions.add(js.string(member.name));
+      expressions.add(js.string(namer.privateName(member.library,
+                                                  member.name)));
     }
     jsAst.ArrayInitializer arrayInit =
       new jsAst.ArrayInitializer.from(expressions);
     builder.addProperty(name, arrayInit);
     compiler.dumpInfoTask.registerElementAst(member, arrayInit);
   }
 
   void addMemberField(VariableElement member, ClassBuilder builder) {
     // For now, do nothing.
   }
 }