Handle html+mirrors

tests/compiler/dart2js/serialization/compilation_test_helper.dart

 // Copyright (c) 2016, 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_compilation_test;
 
 import 'dart:async';
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/filenames.dart';
 import '../memory_compiler.dart';
 import 'helper.dart';
 import 'test_data.dart';
 import '../output_collector.dart';
 
 /// Number of tests that are not part of the automatic test grouping.
 int SKIP_COUNT = 2;
 
 /// Number of groups that the [TESTS] are split into.
 int SPLIT_COUNT = 5;
 
 main(List<String> args) {
   asyncTest(() async {
     Arguments arguments = new Arguments.from(args);
     SerializedData serializedData =
         await serializeDartCore(arguments: arguments);
     if (arguments.filename != null) {
       Uri entryPoint = Uri.base.resolve(nativeToUriPath(arguments.filename));
+      SerializationResult result = await serialize(entryPoint,
+          memorySourceFiles: serializedData.toMemorySourceFiles(),
+          resolutionInputs: serializedData.toUris());
       await compile(
           entryPoint,
-          resolutionInputs: serializedData.toUris(),
-          sourceFiles: serializedData.toMemorySourceFiles());
+          resolutionInputs: result.serializedData.toUris(),
+          sourceFiles: result.serializedData.toMemorySourceFiles());
     } else {
       Uri entryPoint = Uri.parse('memory:main.dart');
       await arguments.forEachTest(serializedData, TESTS, compile);
     }
     printMeasurementResults();
   });
 }
 
 Future compile(
     Uri entryPoint,
     {Map<String, String> sourceFiles: const <String, String>{},
      List<Uri> resolutionInputs,
      int index,
      Test test,
      bool verbose: false}) async {
   String testDescription = test != null ? test.name : '${entryPoint}';
   String id = index != null ? '$index: ' : '';
   String title = '${id}${testDescription}';
   OutputCollector outputCollector = new OutputCollector();
   await measure(title, 'compile', () async {
     List<String> options = [];
-    if (test.checkedMode) {
+    if (test != null && test.checkedMode) {
       options.add(Flags.enableCheckedMode);
     }
     await runCompiler(
         entryPoint: entryPoint,
         memorySourceFiles: sourceFiles,
         resolutionInputs: resolutionInputs,
         options: options,
         outputProvider: outputCollector);
   });
   if (verbose) {
     print(outputCollector.getOutput('', 'js'));
   }
 }