Refactor CompilerOutput

tests/compiler/dart2js/sourcemaps/nomapping_test.dart

Index: tests/compiler/dart2js/sourcemaps/nomapping_test.dart
diff --git a/tests/compiler/dart2js/sourcemaps/nomapping_test.dart b/tests/compiler/dart2js/sourcemaps/nomapping_test.dart
index 124e0ea88ed326f330cf2a186a064f701db887e7..fea30b4116581ab97336588c36494ef662cfe4e5 100644
--- a/tests/compiler/dart2js/sourcemaps/nomapping_test.dart
+++ b/tests/compiler/dart2js/sourcemaps/nomapping_test.dart
@@ -77,10 +77,11 @@ Future runTest(int index, String code,
       options: options);
   Expect.isTrue(compilationResult.isSuccess,
       "Unsuccessful compilation of test:\n${code}");
-  String sourceMapText = collector.getOutput('', 'js.map');
+  String sourceMapText = collector.getOutput('', OutputType.sourceMap);
   SingleMapping sourceMap = parse(sourceMapText);
   if (writeJs) {
-    new File('out.js').writeAsStringSync(collector.getOutput('', 'js'));
+    new File('out.js')
+        .writeAsStringSync(collector.getOutput('', OutputType.js));
     new File('out.js.map').writeAsStringSync(sourceMapText);
   }
   Expect.isTrue(sourceMap.lines.isNotEmpty);