Tear-off --fast-startup mode performance fix

pkg/compiler/lib/src/js_backend/namer.dart

Index: pkg/compiler/lib/src/js_backend/namer.dart
diff --git a/pkg/compiler/lib/src/js_backend/namer.dart b/pkg/compiler/lib/src/js_backend/namer.dart
index 9d86752a40b6e076b2500118701ebfc43a4ff986..7cc907ae7ff0843c0006449b98fa5d9ef2b9bae6 100644
--- a/pkg/compiler/lib/src/js_backend/namer.dart
+++ b/pkg/compiler/lib/src/js_backend/namer.dart
@@ -331,6 +331,7 @@ class Namer {
   final String callPrefix = 'call';
   final String callCatchAllName = r'call*';
   final String callNameField = r'$callName';
+  final String stubNameField = r'$stubName';
   final String reflectableField = r'$reflectable';
   final String reflectionInfoField = r'$reflectionInfo';
   final String reflectionNameField = r'$reflectionName';