Add type inference for invalid constructor initializers.

pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart

Index: pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
diff --git a/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart b/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
index 0256ac57f30164b0766faad26a87cfb01ebf605c..df3fcefc2148bddc98d353ad7b4a2ae875ba58b7 100644
--- a/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
+++ b/pkg/front_end/lib/src/fasta/type_inference/type_inference_listener.dart
@@ -232,6 +232,12 @@ class TypeInferenceListener
   void intLiteralExit(IntLiteral expression, DartType inferredType) =>
       genericExpressionExit("intLiteral", expression, inferredType);
 
+  void invalidInitializerEnter(LocalInitializer initializer) =>
+      genericInitializerEnter("invalidInitializer", initializer);
+
+  void invalidInitializerExit(LocalInitializer initializer) =>
+      genericInitializerExit("invalidInitializer", initializer);
+
   bool isExpressionEnter(IsExpression expression, DartType typeContext) =>
       genericExpressionEnter("isExpression", expression, typeContext);