Revert "Use JS backend in serialization_analysis_test"

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..c913a3cf5ad7daa3e60dc60c9fff62a35f73ee93 100644
--- a/tests/compiler/dart2js/serialization_test.dart
+++ b/tests/compiler/dart2js/serialization_test.dart
@@ -15,9 +15,9 @@ import 'package:compiler/src/diagnostics/invariant.dart';
 import 'package:compiler/src/elements/elements.dart';
 import 'package:compiler/src/elements/visitor.dart';
 import 'package:compiler/src/ordered_typeset.dart';
-import 'package:compiler/src/serialization/element_serialization.dart';
-import 'package:compiler/src/serialization/json_serializer.dart';
 import 'package:compiler/src/serialization/serialization.dart';
+import 'package:compiler/src/serialization/json_serializer.dart';
+import 'package:compiler/src/tree/tree.dart';
 
 main(List<String> arguments) {
   // Ensure that we can print out constant expressions.
@@ -472,28 +472,41 @@ class ElementPropertyEquivalence extends BaseElementVisitor<dynamic, Element> {
           element1.libraryName, element2.libraryName);
     visitMembers(element1, element2);
     visit(element1.entryCompilationUnit, element2.entryCompilationUnit);
-
     checkElementLists(
         element1, element2, 'compilationUnits',
-        LibrarySerializer.getCompilationUnits(element1),
-        LibrarySerializer.getCompilationUnits(element2));
+        element1.compilationUnits.toList(),
+        element2.compilationUnits.toList());
 
     checkElementListIdentities(
-        element1, element2, 'imports',
-        LibrarySerializer.getImports(element1),
-        LibrarySerializer.getImports(element2));
+        element1, element2, 'imports', element1.imports, element2.imports);
     checkElementListIdentities(
         element1, element2, 'exports', element1.exports, element2.exports);
 
+    List<Element> imports1 = <Element>[];
+    List<Element> imports2 = <Element>[];
+    element1.forEachImport((Element import) {
+      if (import.isAmbiguous) return;
+      imports1.add(import);
+    });
+    element2.forEachImport((Element import) {
+      if (import.isAmbiguous) return;
+      imports2.add(import);
+    });
     checkElementListIdentities(
-        element1, element2, 'importScope',
-        LibrarySerializer.getImportedElements(element1),
-        LibrarySerializer.getImportedElements(element2));
+        element1, element2, 'importScope', imports1, imports2);
 
+    List<Element> exports1 = <Element>[];
+    List<Element> exports2 = <Element>[];
+    element1.forEachExport((Element export) {
+      if (export.isAmbiguous) return;
+      exports1.add(export);
+    });
+    element2.forEachExport((Element export) {
+      if (export.isAmbiguous) return;
+      exports2.add(export);
+    });
     checkElementListIdentities(
-        element1, element2, 'exportScope',
-        LibrarySerializer.getExportedElements(element1),
-        LibrarySerializer.getExportedElements(element2));
+        element1, element2, 'exportScope', exports1, exports2);
   }
 
   @override