Refactor CompilerOutput

tests/compiler/dart2js/preserve_uris_test.dart

Index: tests/compiler/dart2js/preserve_uris_test.dart
diff --git a/tests/compiler/dart2js/preserve_uris_test.dart b/tests/compiler/dart2js/preserve_uris_test.dart
index ed7a361c66612676e1018650ac84e7d923cf4e17..fdf660f79021439795d55064a6de6c12fbcc53a5 100644
--- a/tests/compiler/dart2js/preserve_uris_test.dart
+++ b/tests/compiler/dart2js/preserve_uris_test.dart
@@ -4,6 +4,7 @@
 
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
+import 'package:compiler/compiler_new.dart';
 import 'memory_compiler.dart' show runCompiler, OutputCollector;
 
 const MEMORY_SOURCE_FILES = const <String, String>{
@@ -45,7 +46,7 @@ runTest(bool preserveUris) async {
       memorySourceFiles: MEMORY_SOURCE_FILES,
       outputProvider: collector,
       options: options);
-  String jsOutput = collector.getOutput('', 'js');
+  String jsOutput = collector.getOutput('', OutputType.js);
   Expect.equals(preserveUris, jsOutput.contains("main.dart"));
   Expect.equals(preserveUris, jsOutput.contains("lib.dart"));
 }