Handle int constant

tests/compiler/dart2js/mirrors_used_test.dart

 // Copyright (c) 2013, 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.
 
 /// Test that the @MirrorsUsed annotation suppress hints and that only
 /// requested elements are retained for reflection.
 library dart2js.test.mirrors_used_test;
 
 import 'package:expect/expect.dart';
 import "package:async_helper/async_helper.dart";
@@ skipping 10 matching lines @@
 
 import 'package:compiler/src/js_backend/js_backend.dart' show JavaScriptBackend;
 import 'package:compiler/src/js_backend/mirrors_analysis.dart';
 
 import 'package:compiler/src/js_emitter/full_emitter/emitter.dart' as full
     show Emitter;
 
 import 'package:compiler/src/old_to_new_api.dart'
     show LegacyCompilerDiagnostics;
 
+import 'package:compiler/src/universe/world_builder.dart';
+
 void expectOnlyVerboseInfo(Uri uri, int begin, int end, String message, kind) {
   if (kind.name == 'verbose info') {
     print(message);
     return;
   }
   if (message.contains('methods retained for use by dart:mirrors out of')) {
     print(message);
     return;
   }
   if (kind.name == 'info') return;
@@ skipping 95 matching lines @@
         } else {
           Expect.isFalse(
               compiler.backend.mirrorsData
                   .isMemberAccessibleByReflection(member),
               '$member');
         }
       });
     }
 
     int metadataCount = 0;
-    Set<ConstantValue> compiledConstants = backend.constants.compiledConstants;
+    CodegenWorldBuilderImpl codegenWorldBuilder = compiler.codegenWorldBuilder;
+    Set<ConstantValue> compiledConstants =
+        codegenWorldBuilder.compiledConstants;
     // Make sure that most of the metadata constants aren't included in the
     // generated code.
     MirrorsResolutionAnalysisImpl mirrorsResolutionAnalysis =
         backend.mirrorsResolutionAnalysis;
     mirrorsResolutionAnalysis.processMetadata(
         compiler.enqueuer.resolution.processedEntities, (metadata) {
       ConstantValue constant =
           backend.constants.getConstantValueForMetadata(metadata);
       Expect.isFalse(
           compiledConstants.contains(constant), constant.toStructuredText());
@@ skipping 44 matching lines @@
 library lib;
 
 import 'dart:mirrors';
 
 useReflect(type) {
   print(new Symbol('Foo'));
   print(MirrorSystem.getName(reflectClass(type).owner.qualifiedName));
 }
 """,
 };