Revert "Use JS backend in serialization_analysis_test"

tests/compiler/dart2js/serialization_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.serialization_test;
 
 import 'dart:io';
 import 'memory_compiler.dart';
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/constants/constructors.dart';
 import 'package:compiler/src/constants/expressions.dart';
 import 'package:compiler/src/dart_types.dart';
 import 'package:compiler/src/compiler.dart';
 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/serialization.dart';
 import 'package:compiler/src/serialization/json_serializer.dart';
-import 'package:compiler/src/serialization/serialization.dart';
+import 'package:compiler/src/tree/tree.dart';
 
 main(List<String> arguments) {
   // Ensure that we can print out constant expressions.
   DEBUG_MODE = true;
 
   Uri entryPoint;
   String outPath;
   bool prettyPrint = false;
   for (String arg in arguments) {
     if (arg.startsWith('--')) {
@@ skipping 434 matching lines @@
   }
 
   @override
   void visitLibraryElement(LibraryElement element1, LibraryElement element2) {
     checkElementIdentities(null, null, null, element1, element2);
     check(element1, element2, 'name', element1.name, element2.name);
     check(element1, element2, 'libraryName',
           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
   void visitCompilationUnitElement(CompilationUnitElement element1,
                                    CompilationUnitElement element2) {
     check(element1, element2,
           'name',
           element1.name, element2.name);
     checkElementIdentities(
         element1, element2, 'library',
@@ skipping 568 matching lines @@
         exp1, exp2, 'expression',
         exp1.expression, exp2.expression);
   }
 
   @override
   visitDeferred(DeferredConstantExpression exp1,
                 DeferredConstantExpression exp2) {
     // TODO: implement visitDeferred
   }
 }