Use FastaMessage instead of String. Part 1.

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_invalid_type_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_invalid_type_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_invalid_type_builder.dart
index b9ee945cd751fb6f3623ede4ab7821db900b0da3..3eb04e042235a78b4bfb3045d90140be9497213a 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_invalid_type_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_invalid_type_builder.dart
@@ -6,6 +6,8 @@ library fasta.kernel_invalid_type_builder;
 
 import 'package:kernel/ast.dart' show DartType, InvalidType;
 
+import '../fasta_codes.dart' show templateTypeNotFound;
+
 import 'kernel_builder.dart'
     show InvalidTypeBuilder, KernelTypeBuilder, LibraryBuilder;
 
@@ -26,7 +28,8 @@ class KernelInvalidTypeBuilder
   /// [Arguments] have already been built.
   DartType buildTypesWithBuiltArguments(
       LibraryBuilder library, List<DartType> arguments) {
-    library.deprecated_addWarning(charOffset, message, fileUri: fileUri);
+    library.addWarning(
+        templateTypeNotFound.withArguments(name), charOffset, fileUri);
     return const InvalidType();
   }
 }