Add analysis options for front end, and fix a bug discovered by strong mode.

pkg/front_end/tool/perf.dart

Index: pkg/front_end/tool/perf.dart
diff --git a/pkg/front_end/tool/perf.dart b/pkg/front_end/tool/perf.dart
index e8d50a8479344eaa9d589c7212e3850ded53bbe9..ec306caf644c524656e26d9c687eef8ef50b2d3c 100644
--- a/pkg/front_end/tool/perf.dart
+++ b/pkg/front_end/tool/perf.dart
@@ -74,7 +74,7 @@ main(List<String> args) async {
   if (handler == null) {
     // TODO(sigmund): implement the remaining benchmarks.
     print('unsupported bench-id: $bench. Please specify one of the following: '
-        '${handler.keys.join(", ")}');
+        '${handlers.keys.join(", ")}');
     exit(1);
   }
   await handler();