Add type inference of annotations.

pkg/front_end/lib/src/fasta/source/stack_listener.dart

Index: pkg/front_end/lib/src/fasta/source/stack_listener.dart
diff --git a/pkg/front_end/lib/src/fasta/source/stack_listener.dart b/pkg/front_end/lib/src/fasta/source/stack_listener.dart
index 0edab65078c7c059dc522b43f0ecf288837a76e8..f1bfcf53923aff07d5704f66fb244406b8a09f3a 100644
--- a/pkg/front_end/lib/src/fasta/source/stack_listener.dart
+++ b/pkg/front_end/lib/src/fasta/source/stack_listener.dart
@@ -14,7 +14,7 @@ import '../scanner.dart' show Token;
 
 import '../../scanner/token.dart' show BeginToken;
 
-import 'package:kernel/ast.dart' show AsyncMarker;
+import 'package:kernel/ast.dart' show AsyncMarker, Expression;
 
 import '../errors.dart' show inputError, internalError;
 
@@ -67,6 +67,12 @@ abstract class StackListener extends Listener {
     return internalError("Unsupported operation");
   }
 
+  // TODO(ahe): This doesn't belong here. Only implemented by body_builder.dart
+  // and ast_builder.dart.
+  List<Expression> finishMetadata() {
+    return internalError("Unsupported operation");
+  }
+
   // TODO(ahe): This doesn't belong here. Only implemented by body_builder.dart
   // and ast_builder.dart.
   void exitLocalScope() => internalError("Unsupported operation");