Remove deprecated methods from ClassBuilder.

pkg/front_end/tool/_fasta/generate_messages.dart

Index: pkg/front_end/tool/_fasta/generate_messages.dart
diff --git a/pkg/front_end/tool/_fasta/generate_messages.dart b/pkg/front_end/tool/_fasta/generate_messages.dart
index 2e37db788b88dbc4cfdbfbabf2be1b65e5bb25f0..716e933ab2e3b731384b02dabe0073b4e020242c 100644
--- a/pkg/front_end/tool/_fasta/generate_messages.dart
+++ b/pkg/front_end/tool/_fasta/generate_messages.dart
@@ -80,6 +80,11 @@ String compileTemplate(String name, String template, String tip,
         arguments.add("'name2': name2");
         break;
 
+      case "#name3":
+        parameters.add("String name3");
+        arguments.add("'name3': name3");
+        break;
+
       case "#lexeme":
         parameters.add("Token token");
         conversions.add("String lexeme = token.lexeme;");