Pay some naming debt.

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 9b304e488f675c3b6fcc619d83f7e83b90c576de..3cbbfca30490db35e6cf95120452770b90bac24a 100644
--- a/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/body_builder.dart
@@ -733,7 +733,7 @@ class BodyBuilder extends ScopeListener<JumpTarget> implements BuilderHelper {
       {bool isPrefix: false}) {
     if (builder == null || (!isInstanceContext && builder.isInstanceMember)) {
       if (!isPrefix && identical(name, "dynamic") && builder == null) {
-        return new KernelInterfaceTypeBuilder(name, null);
+        return new KernelNamedTypeBuilder(name, null);
       }
       Name n = new Name(name, library.library);
       if (!isPrefix && isInstanceContext) {