Deprecate all diagnostics methods that use strings.

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

Index: pkg/front_end/lib/src/fasta/kernel/kernel_type_variable_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/kernel/kernel_type_variable_builder.dart b/pkg/front_end/lib/src/fasta/kernel/kernel_type_variable_builder.dart
index e0472a2d03a99db9d70604d592e3849b83180d7d..dac7d72beda9ee237ddcde85d14cb110773cbd50 100644
--- a/pkg/front_end/lib/src/fasta/kernel/kernel_type_variable_builder.dart
+++ b/pkg/front_end/lib/src/fasta/kernel/kernel_type_variable_builder.dart
@@ -7,7 +7,7 @@ library fasta.kernel_type_variable_builder;
 import 'package:kernel/ast.dart'
     show DartType, TypeParameter, TypeParameterType;
 
-import '../errors.dart' show inputError;
+import '../deprecated_problems.dart' show deprecated_inputError;
 
 import 'kernel_builder.dart'
     show
@@ -33,7 +33,7 @@ class KernelTypeVariableBuilder
   DartType buildType(
       LibraryBuilder library, List<KernelTypeBuilder> arguments) {
     if (arguments != null) {
-      library.addWarning(arguments.first.charOffset,
+      library.deprecated_addWarning(arguments.first.charOffset,
           "Can't use type arguments with type parameter $parameter",
           fileUri: fileUri);
     }
@@ -43,7 +43,7 @@ class KernelTypeVariableBuilder
   DartType buildTypesWithBuiltArguments(
       LibraryBuilder library, List<DartType> arguments) {
     if (arguments != null) {
-      return inputError(null, null,
+      return deprecated_inputError(null, null,
           "Can't use type arguments with type parameter $parameter");
     } else {
       return buildType(library, null);