Use memory compiler in compiler_helper.dart.

tests/compiler/dart2js/type_test_helper.dart

Index: tests/compiler/dart2js/type_test_helper.dart
diff --git a/tests/compiler/dart2js/type_test_helper.dart b/tests/compiler/dart2js/type_test_helper.dart
index 4f6dcd183aaaab889a5d7b169ed7f2854f16679f..c67d0bafb7d924d55fbbee73c39dece394501467 100644
--- a/tests/compiler/dart2js/type_test_helper.dart
+++ b/tests/compiler/dart2js/type_test_helper.dart
@@ -8,6 +8,7 @@ import 'dart:async';
 import 'package:expect/expect.dart';
 import 'compiler_helper.dart' as mock;
 import 'memory_compiler.dart' as memory;
+import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/dart_types.dart';
 import 'package:compiler/src/compiler.dart'
     show Compiler;
@@ -65,7 +66,7 @@ class TypeEnvironment {
           memorySourceFiles: {'main.dart': source},
           diagnosticHandler: collector,
           options: stopAfterTypeInference
-              ? [] : ['--analyze-all', '--analyze-only']);
+              ? [] : [Flags.analyzeAll, Flags.analyzeOnly]);
       getErrors = () => collector.errors;
       getWarnings = () => collector.warnings;
     }