Update elements, nodes and visitors for serialization.

pkg/compiler/lib/src/serialization/equivalence.dart

Index: pkg/compiler/lib/src/serialization/equivalence.dart
diff --git a/pkg/compiler/lib/src/serialization/equivalence.dart b/pkg/compiler/lib/src/serialization/equivalence.dart
index 5bc9d23bb8b85996ca9bbb5ae583135fbc08deae..5c7770bb068c7b50c700eba2614081b6b0559a03 100644
--- a/pkg/compiler/lib/src/serialization/equivalence.dart
+++ b/pkg/compiler/lib/src/serialization/equivalence.dart
@@ -299,6 +299,13 @@ class ElementIdentityEquivalence extends BaseElementVisitor<bool, Element> {
     return checkMembers(element1.memberContext, element2.memberContext);
   }
 
+  @override
+  bool visitLocalVariableElement(LocalVariableElement element1,
+                                 LocalVariableElement element2) {
+    // TODO(johnniwinther): Define an equivalence on locals.
+    return checkMembers(element1.memberContext, element2.memberContext);
+  }
+
   bool visitAbstractFieldElement(AbstractFieldElement element1,
                                  AbstractFieldElement element2) {
     return checkMembers(element1, element2);