Hide internal classes from Memory Profile

runtime/observatory/tests/observatory_ui/mocks/objects/allocation_profile.dart

 // Copyright (c) 2016, 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 mocks;
 
 class AllocationProfileMock implements M.AllocationProfile {
   final DateTime lastServiceGC;
   final DateTime lastAccumulatorReset;
   final M.HeapSpace newSpace;
   final M.HeapSpace oldSpace;
   final Iterable<M.ClassHeapStats> members;
 
   const AllocationProfileMock(
       {this.lastServiceGC,
       this.lastAccumulatorReset,
       this.newSpace: const HeapSpaceMock(),
       this.oldSpace: const HeapSpaceMock(),
       this.members: const []});
 }
 
 class ClassHeapStatsMock implements M.ClassHeapStats {
   final M.ClassRef clazz;
+  final String displayName;
   final M.Allocations newSpace;
   final M.Allocations oldSpace;
   final int promotedInstances;
   final int promotedBytes;
 
   const ClassHeapStatsMock(
       {this.clazz: const ClassRefMock(),
+      this.displayName: null,
       this.newSpace: const AllocationsMock(),
       this.oldSpace: const AllocationsMock(),
       this.promotedInstances: 0,
       this.promotedBytes: 0});
 }
 
 class AllocationsMock implements M.Allocations {
   final M.AllocationCount accumulated;
   final M.AllocationCount current;
 
   const AllocationsMock(
       {this.accumulated: const AllocationCountMock(),
       this.current: const AllocationCountMock()});
 }
 
 class AllocationCountMock implements M.AllocationCount {
   final int instances;
   final int bytes;
 
   const AllocationCountMock({this.instances: 0, this.bytes: 0});
 }