Add handleNoVariableInitializer event.

pkg/front_end/lib/src/fasta/kernel/body_builder.dart

Index: pkg/front_end/lib/src/fasta/kernel/body_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
index ce383bd2062198d5c343b5b3be6946b31371ec0e..b450b3572c7d485b5419ad99407d7812f03a0465 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -879,6 +879,11 @@ class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper {
   }
 
   @override
+  void handleNoVariableInitializer(Token token) {
+    debugEvent("NoVariableInitializer");
+  }
+
+  @override
   void endFieldInitializer(Token assignmentOperator) {
     debugEvent("FieldInitializer");
     assert(assignmentOperator.stringValue == "=");