new handleInvalidTopLevelDeclaration event in fasta parser

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 db6e902d7676535d36ad6c7ecad93be60d3d20f7..4629fcbd18d1ef0f0c79ab5cccea142ea50f56b3 100644
--- a/pkg/front_end/lib/src/fasta/parser/listener.dart
+++ b/pkg/front_end/lib/src/fasta/parser/listener.dart
@@ -704,6 +704,18 @@ class Listener {
     logEvent("TopLevelDeclaration");
   }
 
+  /// Called by the [Parser] when it recovers from an invalid top level
+  /// declaration, where [beginToken] is the first token in the declaration
+  /// and [endToken] is the last. This is called after the begin/end
+  /// metadata star events, and instead of [endTopLevelDeclaration]
+  /// and any of the events listed in [endTopLevelDeclaration].
+  ///
+  /// Substructures:
+  /// - metadata
+  void handleInvalidTopLevelDeclaration(Token beginToken, Token endToken) {
+    logEvent("InvalidTopLevelDeclaration");
+  }
+
   /// Marks the beginning of a top level field or method declaration.
   /// Doesn't have a corresponding end event.
   /// See [endTopLevelFields] and [endTopLevelMethod].