Remove deprecated api from LibraryBuilder.

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 716e933ab2e3b731384b02dabe0073b4e020242c..9058c47359fa29c3a284bb5e0f2c25e0564f4155 100644
--- a/pkg/front_end/tool/_fasta/generate_messages.dart
+++ b/pkg/front_end/tool/_fasta/generate_messages.dart
@@ -85,6 +85,11 @@ String compileTemplate(String name, String template, String tip,
         arguments.add("'name3': name3");
         break;
 
+      case "#number":
+        parameters.add("int number");
+        arguments.add("'number': number");
+        break;
+
       case "#lexeme":
         parameters.add("Token token");
         conversions.add("String lexeme = token.lexeme;");
@@ -113,6 +118,12 @@ String compileTemplate(String name, String template, String tip,
         arguments.add("'uri2': uri2_");
         break;
 
+      case "#uri3":
+        parameters.add("Uri uri3_");
+        conversions.add("String uri3 = relativizeUri(uri3_);");
+        arguments.add("'uri3': uri3_");
+        break;
+
       default:
         throw "Unhandled placeholder in template: ${match[0]}";
     }