Handle type variables.

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

Index: pkg/front_end/lib/src/fasta/parser/listener.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/listener.dart b/pkg/front_end/lib/src/fasta/parser/listener.dart
index 01d30edeffe24a2644c90eefa5f1623c944d4348..e14dcb3828f744b0154a6b54a9e9e08a6a6c324a 100644
--- a/pkg/front_end/lib/src/fasta/parser/listener.dart
+++ b/pkg/front_end/lib/src/fasta/parser/listener.dart
@@ -411,7 +411,8 @@ class Listener {
   /// [dart_vm_native.dart].
   Link<Token> handleMemberName(Link<Token> identifiers) => identifiers;
 
-  /// Doesn't have a corresponding begin event, use [beginMember] instead.
+  void beginMethod(Token token, Token name) {}
+
   void endMethod(Token getOrSet, Token beginToken, Token endToken) {
     logEvent("Method");
   }
@@ -518,8 +519,8 @@ class Listener {
     logEvent("TopLevelFields");
   }
 
-  /// Doesn't have a corresponding begin event, use [beginTopLevelMember]
-  /// instead.
+  void beginTopLevelMethod(Token token, Token name) {}
+
   void endTopLevelMethod(Token beginToken, Token getOrSet, Token endToken) {
     logEvent("TopLevelMethod");
   }