dart2js: add isConstantsHolder to Holder class.

pkg/compiler/lib/src/js_emitter/model.dart

 // Copyright (c) 2014, 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 dart2js.new_js_emitter.model;
 
 import '../js/js.dart' as js show Expression, Statement, Name, Literal,
     TokenFinalizer;
 import '../constants/values.dart' show ConstantValue;
 
@@ skipping 66 matching lines @@
 }
 
 /**
  * This class represents a JavaScript object that contains static state, like
  * classes or functions.
  */
 class Holder {
   final String name;
   final int index;
   final bool isStaticStateHolder;
+  final bool isConstantsHolder;
 
-  Holder(this.name, this.index, {this.isStaticStateHolder: false});
+  Holder(this.name, this.index,
+      {this.isStaticStateHolder: false, this.isConstantsHolder: false});
 }
 
 /**
  * This class represents one output file.
  *
  * If no library is deferred, there is only one [Fragment] of type
  * [MainFragment].
  */
 abstract class Fragment {
   /// The outputUnit should only be used during the transition to the new model.
@@ skipping 394 matching lines @@
               requiredParameterCount: requiredParameterCount,
               optionalParameterDefaultValues: optionalParameterDefaultValues,
               functionType: functionType);
 }
 
 class StaticStubMethod extends StubMethod implements StaticMethod {
   Holder holder;
   StaticStubMethod(js.Name name, this.holder, js.Expression code)
       : super(name, code);
 }