Update Listener implementations.

pkg/front_end/lib/src/fasta/parser.dart

Index: pkg/front_end/lib/src/fasta/parser.dart
diff --git a/pkg/front_end/lib/src/fasta/parser.dart b/pkg/front_end/lib/src/fasta/parser.dart
index 3d4ba49402f9828c234ea691c67bf3d7c47ec702..06e88dcc4bfbf8b56d5963a69807b8649a2fd225 100644
--- a/pkg/front_end/lib/src/fasta/parser.dart
+++ b/pkg/front_end/lib/src/fasta/parser.dart
@@ -12,7 +12,8 @@ import 'parser/parser.dart' show Parser;
 
 import 'parser/listener.dart' show ParserError;
 
-export 'parser/parser.dart' show MemberKind, Parser, optional;
+export 'parser/parser.dart'
+    show FormalParameterType, MemberKind, Parser, optional;
 
 export 'parser/listener.dart' show Listener, ParserError;
 
@@ -20,6 +21,8 @@ export 'parser/top_level_parser.dart' show TopLevelParser;
 
 export 'parser/class_member_parser.dart' show ClassMemberParser;
 
+export 'parser/identifier_context.dart' show IdentifierContext;
+
 List<ParserError> parse(Token tokens) {
   Listener listener = new Listener();
   Parser parser = new Parser(listener);