Add an argument to handleFunctionBodySkipped.

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 ac513a4eb0b5f2a0e73fe0214328ca2e782d20ba..343ac6ac84f65822011b5b5b2fef689884b4c251 100644
--- a/pkg/front_end/lib/src/fasta/parser/listener.dart
+++ b/pkg/front_end/lib/src/fasta/parser/listener.dart
@@ -250,7 +250,11 @@ class Listener {
     logEvent("NoFunctionBody");
   }
 
-  void handleFunctionBodySkipped(Token token) {}
+  /// Handle the end of a function body that was skipped by the parser.
+  ///
+  /// The boolean [isExpressionBody] indicates whether the function body that
+  /// was skipped used "=>" syntax.
+  void handleFunctionBodySkipped(Token token, bool isExpressionBody) {}
 
   void beginFunctionName(Token token) {}