Handle mixed in members

tests/compiler/dart2js/serialization/model_test_helper.dart

Index: tests/compiler/dart2js/serialization/model_test_helper.dart
diff --git a/tests/compiler/dart2js/serialization/model_test_helper.dart b/tests/compiler/dart2js/serialization/model_test_helper.dart
index e6cdc5a3bb9b8997648e5309c1d7f39f7c258bc1..ee18792ce5408a2b3d111906471f2a3083b30b16 100644
--- a/tests/compiler/dart2js/serialization/model_test_helper.dart
+++ b/tests/compiler/dart2js/serialization/model_test_helper.dart
@@ -122,21 +122,14 @@ void checkResolutionEnqueuers(
     bool typeEquivalence(DartType a, DartType b): areTypesEquivalent,
     bool elementFilter(Element element),
     bool verbose: false}) {
-  checkSets(enqueuer1.processedEntities, enqueuer2.processedEntities,
-      "Processed element mismatch", elementEquivalence, elementFilter: (e) {
-    return elementFilter != null ? elementFilter(e) : true;
-  }, verbose: verbose);
-
   ResolutionWorldBuilderBase worldBuilder1 = enqueuer1.worldBuilder;
   ResolutionWorldBuilderBase worldBuilder2 = enqueuer2.worldBuilder;
 
-  checkMaps(
-      worldBuilder1.getInstantiationMap(),
-      worldBuilder2.getInstantiationMap(),
-      "Instantiated classes mismatch",
-      elementEquivalence,
-      (a, b) => areInstantiationInfosEquivalent(
-          a, b, elementEquivalence, typeEquivalence),
+  checkSets(
+      enqueuer1.worldBuilder.instantiatedTypes,
+      enqueuer2.worldBuilder.instantiatedTypes,
+      "Instantiated types mismatch",
+      typeEquivalence,
       verbose: verbose);
 
   checkSets(
@@ -146,13 +139,20 @@ void checkResolutionEnqueuers(
       elementEquivalence,
       verbose: verbose);
 
-  checkSets(
-      enqueuer1.worldBuilder.instantiatedTypes,
-      enqueuer2.worldBuilder.instantiatedTypes,
-      "Instantiated types mismatch",
-      typeEquivalence,
+  checkMaps(
+      worldBuilder1.getInstantiationMap(),
+      worldBuilder2.getInstantiationMap(),
+      "Instantiated classes mismatch",
+      elementEquivalence,
+      (a, b) => areInstantiationInfosEquivalent(
+          a, b, elementEquivalence, typeEquivalence),
       verbose: verbose);
 
+  checkSets(enqueuer1.processedEntities, enqueuer2.processedEntities,
+      "Processed element mismatch", elementEquivalence, elementFilter: (e) {
+    return elementFilter != null ? elementFilter(e) : true;
+  }, verbose: verbose);
+
   checkSets(enqueuer1.worldBuilder.isChecks, enqueuer2.worldBuilder.isChecks,
       "Is-check mismatch", typeEquivalence,
       verbose: verbose);