Support serialization of WorldImpact

tests/compiler/dart2js/serialization_test.dart

Index: tests/compiler/dart2js/serialization_test.dart
diff --git a/tests/compiler/dart2js/serialization_test.dart b/tests/compiler/dart2js/serialization_test.dart
index 9985399579ba7c25561d55f8cf8edf558904256b..a78244e58016f43b3a5de6afdb0dd9ad4a4c60be 100644
--- a/tests/compiler/dart2js/serialization_test.dart
+++ b/tests/compiler/dart2js/serialization_test.dart
@@ -380,7 +380,8 @@ class ElementIdentityEquivalence extends BaseElementVisitor<dynamic, Element> {
           'name',
           element1.name, element2.name);
     if (element1.enclosingClass != null || element2.enclosingClass != null) {
-      visit(element1.enclosingClass, element2.enclosingClass);
+      visit(element1.enclosingClass.declaration,
+            element2.enclosingClass.declaration);
     } else {
       visit(element1.library, element2.library);
     }
@@ -523,21 +524,29 @@ class ElementPropertyEquivalence extends BaseElementVisitor<dynamic, Element> {
   void visitMembers(ScopeContainerElement element1,
                     ScopeContainerElement element2) {
     Set<String> names = new Set<String>();
-    element1.forEachLocalMember((Element member) {
+    Iterable<Element> members1 = element1.isLibrary
+        ? LibrarySerializer.getMembers(element1)
+        : ClassSerializer.getMembers(element1);
+    Iterable<Element> members2 = element2.isLibrary
+        ? LibrarySerializer.getMembers(element2)
+        : ClassSerializer.getMembers(element2);
+    for (Element member in members1) {
       names.add(member.name);
-    });
-    element2.forEachLocalMember((Element member) {
+    }
+    for (Element member in members2) {
       names.add(member.name);
-    });
+    }
+    element1 = element1.implementation;
+    element2 = element2.implementation;
     for (String name in names) {
       Element member1 = element1.localLookup(name);
       Element member2 = element2.localLookup(name);
       if (member1 == null) {
-        print('Missing member for $member2');
+        print('Missing member for $member2 in\n ${members1.join('\n ')}');
         continue;
       }
       if (member2 == null) {
-        print('Missing member for $member1');
+        print('Missing member for $member1 in\n ${members2.join('\n ')}');
         continue;
       }
       visit(member1, member2);