Remove Compiler access from ResolutionEnqueuer

tests/compiler/dart2js/serialization/helper.dart

Index: tests/compiler/dart2js/serialization/helper.dart
diff --git a/tests/compiler/dart2js/serialization/helper.dart b/tests/compiler/dart2js/serialization/helper.dart
index cd6ecb2c2b326d6367d442122ed569f50326e96e..7fab60f19705cc0f9f03ba01143cbb12bb7436ec 100644
--- a/tests/compiler/dart2js/serialization/helper.dart
+++ b/tests/compiler/dart2js/serialization/helper.dart
@@ -11,6 +11,7 @@ import 'package:compiler/src/commandline_options.dart';
 import 'package:compiler/src/common/names.dart';
 import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/elements/elements.dart';
+import 'package:compiler/src/filenames.dart';
 
 import '../memory_compiler.dart';
 import 'test_data.dart';
@@ -71,6 +72,13 @@ class Arguments {
         saveSerializedData: saveSerializedData);
   }
 
+  Uri get uri {
+    if (filename != null) {
+      return Uri.base.resolve(nativeToUriPath(filename));
+    }
+    return null;
+  }
+
   Future forEachTest(SerializedData serializedData, List<Test> tests,
       TestFunction testFunction) async {
     Uri entryPoint = Uri.parse('memory:main.dart');