Update parser and scanner.

pkg/fasta/lib/src/source/diet_parser.dart

Index: pkg/fasta/lib/src/source/diet_parser.dart
diff --git a/pkg/fasta/lib/src/source/diet_parser.dart b/pkg/fasta/lib/src/source/diet_parser.dart
index 1811f859f1e8f60b2c7f996b130e28be8d59b0d2..028e7cd2bc3fc73371250440b9b5340452c96b98 100644
--- a/pkg/fasta/lib/src/source/diet_parser.dart
+++ b/pkg/fasta/lib/src/source/diet_parser.dart
@@ -22,11 +22,8 @@ import 'package:dart_parser/src/parser.dart' show
 
 // TODO(ahe): Move this to parser package.
 class DietParser extends ClassMemberParser {
-  DietParser(Listener listener,
-      {bool asyncAwaitKeywordsEnabled: false,
-       bool enableGenericMethodSyntax: false})
-      : super(listener, asyncAwaitKeywordsEnabled: asyncAwaitKeywordsEnabled,
-          enableGenericMethodSyntax: enableGenericMethodSyntax);
+  DietParser(Listener listener, {bool asyncAwaitKeywordsEnabled: false})
+      : super(listener, asyncAwaitKeywordsEnabled: asyncAwaitKeywordsEnabled);
 
   Token parseFormalParameters(Token token) => skipFormals(token);