Revert "Remove Registry from registerMetadataConstant" and "Serialize metadata"

tests/compiler/dart2js/serialization/model_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_model_test;
 import 'dart:async';
 import 'dart:io';
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
 import 'package:compiler/src/closure.dart';
@@ skipping 14 matching lines @@
     Arguments arguments = new Arguments.from(args);
     SerializedData serializedData =
         await serializeDartCore(arguments: arguments);
     if (arguments.filename != null) {
       Uri entryPoint = Uri.base.resolve(nativeToUriPath(arguments.filename));
       await checkModels(entryPoint,
           sourceFiles: serializedData.toMemorySourceFiles(),
           resolutionInputs: serializedData.toUris());
     } else {
       Uri entryPoint = Uri.parse('memory:main.dart');
-      await arguments.forEachTest(serializedData, TESTS, checkModels);
+      arguments.forEachTest(serializedData, TESTS, checkModels);
     }
   });
 }
 
 Future checkModels(
     Uri entryPoint,
     {Map<String, String> sourceFiles: const <String, String>{},
      List<Uri> resolutionInputs,
      int index,
      Test test,
      bool verbose: false}) async {
+  if (test != null && test.name == 'Disable tree shaking through reflection') {
+    // TODO(johnniwinther): Support serialization of metadata.
+    return;
+  }
+
   String testDescription = test != null ? test.name : '${entryPoint}';
   String id = index != null ? '$index: ' : '';
   print('------------------------------------------------------------------');
   print('compile normal ${id}${testDescription}');
   print('------------------------------------------------------------------');
   Compiler compilerNormal = compilerFor(
       memorySourceFiles: sourceFiles,
       options: [Flags.analyzeOnly]);
   compilerNormal.resolution.retainCachesForTesting = true;
   await compilerNormal.run(entryPoint);
@@ skipping 218 matching lines @@
   return true;
 }
 
 String nodeToString(Node node) {
   String text = '$node';
   if (text.length > 40) {
     return '(${node.runtimeType}) ${text.substring(0, 37)}...';
   }
   return '(${node.runtimeType}) $text';
 }