All strong mode cleaning of dart2js.

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 '../common.dart';
 import '../common_elements.dart' show CommonElements;
 import '../elements/resolution_types.dart';
 import '../elements/elements.dart';
@@ skipping 239 matching lines @@
         builder.emptyStatement());
 
     EnumConstructorElementX constructor = new EnumConstructorElementX(
         enumClass, builder.modifiers(isConst: true), constructorNode);
 
     EnumFormalElementX indexFormal = new EnumFormalElementX(constructor,
         indexDefinition, builder.identifier('index'), indexVariable);
 
     EnumFormalElementX nameFormal;
 
-    List<Element> parameters = <Element>[indexFormal];
+    List<FormalElement> parameters = <FormalElement>[indexFormal];
     List<ResolutionDartType> parameterTypes = <ResolutionDartType>[intType];
     if (!matchKernelRepresentationForTesting) {
       nameFormal = new EnumFormalElementX(constructor, nameDefinition,
           builder.identifier('_name'), nameVariable);
       parameters.add(nameFormal);
       parameterTypes.add(stringType);
     }
     FunctionSignatureX constructorSignature = new FunctionSignatureX(
         requiredParameters: parameters,
         requiredParameterCount: parameters.length,
@@ skipping 79 matching lines @@
     EnumMethodElementX toString = new EnumMethodElementX(
         'toString', enumClass, Modifiers.EMPTY, toStringNode);
     FunctionSignatureX toStringSignature = new FunctionSignatureX(
         type: new ResolutionFunctionType(toString, stringType));
     toString.functionSignature = toStringSignature;
     enumClass.addMember(toString, reporter);
 
     enumClass.enumValues = enumValues;
   }
 }