Revert "Proper sequencing of _asyncStackTraceHelper in Kernel"

pkg/kernel/lib/core_types.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.
 library kernel.core_types;
 
 import 'ast.dart';
 import 'library_index.dart';
 
 /// Provides access to the classes and libraries in the core libraries.
 class CoreTypes {
@@ skipping 59 matching lines @@
   Library _asyncLibrary;
   Class _futureClass;
   Class _streamClass;
   Class _completerClass;
   Class _futureOrClass;
   Procedure _completerSyncConstructor;
   Procedure _futureMicrotaskConstructor;
   Constructor _syncIterableDefaultConstructor;
   Constructor _streamIteratorDefaultConstructor;
   Constructor _asyncStarStreamControllerDefaultConstructor;
-  Procedure _asyncStackTraceHelperProcedure;
   Procedure _asyncThenWrapperHelperProcedure;
   Procedure _asyncErrorWrapperHelperProcedure;
   Procedure _awaitHelperProcedure;
 
   /// The `dart:mirrors` library, or `null` if the program does not use it.
   Library _mirrorsLibrary;
 
   CoreTypes(Program program) : _index = new LibraryIndex.coreLibraries(program);
 
   Procedure get asyncErrorWrapperHelperProcedure {
     return _asyncErrorWrapperHelperProcedure ??=
         _index.getTopLevelMember('dart:async', '_asyncErrorWrapperHelper');
   }
 
   Library get asyncLibrary {
     return _asyncLibrary ??= _index.getLibrary('dart:async');
   }
 
   Constructor get asyncStarStreamControllerDefaultConstructor {
     return _asyncStarStreamControllerDefaultConstructor ??=
         _index.getMember('dart:async', '_AsyncStarStreamController', '');
   }
 
-  Procedure get asyncStackTraceHelperProcedure {
-    return _asyncStackTraceHelperProcedure ??=
-        _index.getTopLevelMember('dart:async', '_asyncStackTraceHelper');
-  }
-
   Procedure get asyncThenWrapperHelperProcedure {
     return _asyncThenWrapperHelperProcedure ??=
         _index.getTopLevelMember('dart:async', '_asyncThenWrapperHelper');
   }
 
   Procedure get awaitHelperProcedure {
     return _awaitHelperProcedure ??=
         _index.getTopLevelMember('dart:async', '_awaitHelper');
   }
 
@@ skipping 149 matching lines @@
   Constructor get constantExpressionErrorDefaultConstructor {
     return _constantExpressionErrorDefaultConstructor ??=
         _index.getMember('dart:core', '_ConstantExpressionError', '');
   }
 
   Constructor get compileTimeErrorDefaultConstructor {
     return _compileTimeErrorDefaultConstructor ??=
         _index.getMember('dart:core', '_CompileTimeError', '');
   }
 }