Update elements, nodes and visitors for serialization.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.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.
 
 library dart2js.ir_builder_task;
 
 import '../closure.dart' as closure;
 import '../common.dart';
 import '../common/names.dart' show Identifiers, Names, Selectors;
 import '../common/tasks.dart' show CompilerTask;
@@ skipping 3161 matching lines @@
       callStructure = translateStaticArguments(
           argumentList, element, callStructure, arguments);
       Selector selector = new Selector.call(element.memberName, callStructure);
       return irBuilder.buildInvokeStatic(element, selector, arguments,
           sourceInformationBuilder.buildCall(node, node.selector));
     }
 
     /// Lookup the value of the enum described by [node].
     getEnumValue(ast.Node node, EnumClassElement enumClass, List values) {
       Element element = elements[node];
-      if (element is! FieldElement || element.enclosingClass != enumClass) {
+      if (element is! EnumConstantElement ||
+          element.enclosingClass != enumClass) {
         internalError(node, 'expected a JsBuiltin enum value');
       }
-
-      int index = enumClass.enumValues.indexOf(element);
+      EnumConstantElement enumConstant = element;
+      int index = enumConstant.index;
       return values[index];
     }
 
     /// Returns the String the node evaluates to, or throws an error if the
     /// result is not a string constant.
     String expectStringConstant(ast.Node node) {
       ir.Primitive nameValue = visit(node);
       if (nameValue is ir.Constant && nameValue.value.isString) {
         StringConstantValue constantValue = nameValue.value;
         return constantValue.primitiveValue.slowToString();
@@ skipping 821 matching lines @@
       _backend.jsInteropAnalysis.hasAnonymousAnnotation(element.contextClass);
 
   String getJsInteropTargetPath(FunctionElement element) {
     return '${_backend.namer.fixedBackendPath(element)}.'
         '${_backend.nativeData.getFixedBackendName(element)}';
   }
 
   DartType get jsJavascriptObjectType =>
       _backend.helpers.jsJavaScriptObjectClass.thisType;
 }