Issue 5255. Remember 'overridden' for getters/setters and fields

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

 // Copyright (c) 2012, 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.common.annotations.VisibleForTesting;
 import com.google.common.base.Objects;
 import com.google.common.collect.Lists;
 import com.google.dart.compiler.DartSource;
@@ skipping 180 matching lines @@
                                                       ClassElement declaringClass,
                                                       ClassElement constructorType) {
     return ConstructorElementImplementation.fromMethodNode(node, name, declaringClass,
                                                            constructorType);
   }
 
   public static void setType(Element element, Type type) {
     ((AbstractNodeElement) element).setType(type);
   }
 
-  public static void setOverridden(MethodElement methodElement, Set<Element> overridden) {
-    ((MethodElementImplementation) methodElement).setOverridden(overridden);
+  public static void setOverridden(Element element, Set<Element> overridden) {
+    if (element instanceof MethodElementImplementation) {
+      ((MethodElementImplementation) element).setOverridden(overridden);
+    }
+    if (element instanceof FieldElementImplementation) {
+      ((FieldElementImplementation) element).setOverridden(overridden);
+    }
   }
 
 static FieldElementImplementation fieldFromNode(DartField node,
                                                   EnclosingElement holder,
                                                   DartObsoleteMetadata metadata,
                                                   Modifiers modifiers) {
     return FieldElementImplementation.fromNode(node, holder, metadata, modifiers);
   }
 
   static ClassElement classFromNode(DartClass node, LibraryElement library) {
@@ skipping 581 matching lines @@
    */
   public static boolean handlesNoSuchMethod(InterfaceType type) {
     Member member = type.lookupMember("noSuchMethod");
     if (member == null) {
       return false;
     }
     Source source = member.getElement().getSourceInfo().getSource();
     return !isCoreLibrarySource(source);
   }
 }