Make computeSignature private to modelx.

pkg/compiler/lib/src/resolution/enum_creator.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.resolution.enum_creator;
 
 import '../core_types.dart' show
     CoreTypes;
 import '../dart_types.dart';
 import '../diagnostics/diagnostic_listener.dart' show
@@ skipping 215 matching lines @@
         constructor,
         indexDefinition,
         builder.identifier('index'),
         indexVariable);
 
     FunctionSignatureX constructorSignature = new FunctionSignatureX(
         requiredParameters: [indexFormal],
         requiredParameterCount: 1,
         type: new FunctionType(constructor, const VoidType(),
             <DartType>[intType]));
-    constructor.functionSignatureCache = constructorSignature;
+    constructor.functionSignature = constructorSignature;
     enumClass.addMember(constructor, reporter);
 
     List<FieldElement> enumValues = <FieldElement>[];
     VariableList variableList =
         new VariableList(builder.modifiers(isStatic: true, isConst: true));
     variableList.type = enumType;
     int index = 0;
     List<Node> valueReferences = <Node>[];
     List<LiteralMapEntry> mapEntries = <LiteralMapEntry>[];
     for (Link<Node> link = node.names.nodes;
@@ skipping 50 matching lines @@
               builder.indexGet(
                   builder.mapLiteral(mapEntries, isConst: true),
                   builder.reference(builder.identifier('index')))
             )
         );
 
     EnumMethodElementX toString = new EnumMethodElementX('toString',
         enumClass, Modifiers.EMPTY, toStringNode);
     FunctionSignatureX toStringSignature = new FunctionSignatureX(
         type: new FunctionType(toString, stringType));
-    toString.functionSignatureCache = toStringSignature;
+    toString.functionSignature = toStringSignature;
     enumClass.addMember(toString, reporter);
 
     enumClass.enumValues = enumValues;
   }
 }