More dart2js strong mode cleanup.

pkg/compiler/lib/src/resolution/semantic_visitor.dart

Index: pkg/compiler/lib/src/resolution/semantic_visitor.dart
diff --git a/pkg/compiler/lib/src/resolution/semantic_visitor.dart b/pkg/compiler/lib/src/resolution/semantic_visitor.dart
index 3c837fe91069701fc45d5e2b4ad044ba35d96a22..98ead8492ba7d8bb51fbb2db5c76bd66c95aa879 100644
--- a/pkg/compiler/lib/src/resolution/semantic_visitor.dart
+++ b/pkg/compiler/lib/src/resolution/semantic_visitor.dart
@@ -3966,8 +3966,13 @@ abstract class SemanticSendVisitor<R, A> {
   ///
   // TODO(johnniwinther): Change [type] to [MalformedType] when is it not
   // `dynamic`.
-  R visitUnresolvedClassConstructorInvoke(NewExpression node, Element element,
-      ResolutionDartType type, NodeList arguments, Selector selector, A arg);
+  R visitUnresolvedClassConstructorInvoke(
+      NewExpression node,
+      ErroneousElement element,
+      ResolutionDartType type,
+      NodeList arguments,
+      Selector selector,
+      A arg);
 
   /// Constant invocation of a non-constant constructor.
   ///