Revert "Enqueue superclasses instead of supertypes."

tests/compiler/dart2js/analyze_unused_dart2js_test.dart

Index: tests/compiler/dart2js/analyze_unused_dart2js_test.dart
diff --git a/tests/compiler/dart2js/analyze_unused_dart2js_test.dart b/tests/compiler/dart2js/analyze_unused_dart2js_test.dart
index 9e12791a6543eb172de5ef671d18fdf9938504de..10fc5a594476a96a9f3536a2cc6b00fa81a65cf4 100644
--- a/tests/compiler/dart2js/analyze_unused_dart2js_test.dart
+++ b/tests/compiler/dart2js/analyze_unused_dart2js_test.dart
@@ -71,13 +71,8 @@ const Map<String, List<String>> WHITE_LIST = const {
 void main() {
   var uri = currentDirectory.resolve(
       'pkg/compiler/lib/src/use_unused_api.dart');
-  asyncTest(() => analyze(
-      [uri],
-      // TODO(johnniwinther): Use [WHITE_LIST] again when
-      // [Compiler.reportUnusedCode] is reenabled.
-      const {}, // WHITE_LIST
-      analyzeAll: false,
-      checkResults: checkResults));
+  asyncTest(() => analyze([uri], WHITE_LIST,
+      analyzeAll: false, checkResults: checkResults));
 }
 
 bool checkResults(Compiler compiler, CollectingDiagnosticHandler handler) {