Fixes for previous CL review comments

compiler/java/com/google/dart/compiler/resolver/VariableElementImplementation.java

 // Copyright (c) 2011, 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.
 
 package com.google.dart.compiler.resolver;
 
 import com.google.dart.compiler.ast.DartExpression;
 import com.google.dart.compiler.ast.DartNode;
 import com.google.dart.compiler.ast.Modifiers;
 import com.google.dart.compiler.common.SourceInfo;
 import com.google.dart.compiler.type.Type;
 
 class VariableElementImplementation extends AbstractElement implements VariableElement {
-  private final Element owner;
+  private final EnclosingElement owner;
   private final ElementKind kind;
   private final Modifiers modifiers;
   private final boolean isNamed;
   private final DartExpression defaultValue;
   private final SourceInfo nameLocation;
 
   // The field element is set for constructor parameters of the form
   // this.foo by the resolver.
   private FieldElement fieldElement;
   private Type type;
 
-  VariableElementImplementation(Element owner,
+  VariableElementImplementation(EnclosingElement owner,
       DartNode node,
       SourceInfo nameLocation,
       String name,
       ElementKind kind,
       Modifiers modifiers,
       boolean isNamed,
       DartExpression defaultValue) {
     super(node, name);
     this.owner = owner;
     this.isNamed = isNamed;
@@ skipping 41 matching lines @@
   void setParameterInitializerElement(FieldElement element) {
     this.fieldElement = element;
   }
 
   @Override
   public FieldElement getParameterInitializerElement() {
     return fieldElement;
   }
 
   @Override
-  public Element getEnclosingElement() {
+  public EnclosingElement getEnclosingElement() {
     return owner;
   }
 }