First step to resolving simple API changes.

pkg/analyzer/lib/src/generated/element_handle.dart

Index: pkg/analyzer/lib/src/generated/element_handle.dart
diff --git a/pkg/analyzer/lib/src/generated/element_handle.dart b/pkg/analyzer/lib/src/generated/element_handle.dart
index 61afb897b5ce43ff045caff0961a2d60f4d9966d..9c2ada3bb4bc5c1a729b97bdabf86eabc17d8175 100644
--- a/pkg/analyzer/lib/src/generated/element_handle.dart
+++ b/pkg/analyzer/lib/src/generated/element_handle.dart
@@ -7,6 +7,8 @@
 
 library engine.element_handle;
 
+import 'package:analyzer/src/generated/utilities_collection.dart';
+
 import 'ast.dart';
 import 'element.dart';
 import 'engine.dart';
@@ -279,6 +281,11 @@ class ConstructorElementHandle extends ExecutableElementHandle implements
  */
 abstract class ElementHandle implements Element {
   /**
+   * The unique integer identifier of this element.
+   */
+  final int id = 0;
+
+  /**
    * The context in which the element is defined.
    */
   AnalysisContext _context;
@@ -374,6 +381,9 @@ abstract class ElementHandle implements Element {
   CompilationUnit get unit => actualElement.unit;
 
   @override
+  IntSet get users => new IntSet();
+
+  @override
   bool operator ==(Object object) =>
       object is Element && object.location == _location;
 
@@ -381,6 +391,10 @@ abstract class ElementHandle implements Element {
   accept(ElementVisitor visitor) => actualElement.accept(visitor);
 
   @override
+  void addUser(Element element) {
+  }
+
+  @override
   String computeDocumentationComment() =>
       actualElement.computeDocumentationComment();