Remove deprecated api from LibraryBuilder.

pkg/front_end/lib/src/fasta/loader.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.loader;
 
 import 'dart:async' show Future;
 
 import 'dart:collection' show Queue;
 
 import 'builder/builder.dart' show Builder, LibraryBuilder;
 
 import 'deprecated_problems.dart'
     show firstSourceUri, deprecated_printUnexpected;
 
-import 'messages.dart' show LocatedMessage, Message, templateUnspecified;
+import 'messages.dart'
+    show LocatedMessage, Message, messagePlatformPrivateLibraryAccess;
 
 import 'target_implementation.dart' show TargetImplementation;
 
 import 'ticker.dart' show Ticker;
 
 abstract class Loader<L> {
   final Map<Uri, LibraryBuilder> builders = <Uri, LibraryBuilder>{};
 
   final Queue<LibraryBuilder> unparsedLibraries = new Queue<LibraryBuilder>();
 
@@ skipping 69 matching lines @@
       first ??= library;
       if (library.loader == this) {
         unparsedLibraries.addLast(library);
       }
       return library;
     });
     if (accessor != null &&
         uri.scheme == "dart" &&
         uri.path.startsWith("_") &&
         accessor.uri.scheme != "dart") {
-      accessor.deprecated_addCompileTimeError(
-          charOffset, "Can't access platform private library.");
+      accessor.addCompileTimeError(
+          messagePlatformPrivateLibraryAccess, charOffset, accessor.fileUri);
     }
     return builder;
   }
 
   void ensureCoreLibrary() {
     if (coreLibrary == null) {
       read(Uri.parse("dart:core"), -1);
       assert(coreLibrary != null);
     }
   }
@@ skipping 54 matching lines @@
   /// otherwise it is added to [unhandledErrors].
   void addCompileTimeError(Message message, int charOffset, Uri fileUri,
       {bool silent: false, bool wasHandled: false}) {
     if (!silent) {
       deprecated_printUnexpected(fileUri, charOffset, message.message);
     }
     (wasHandled ? handledErrors : unhandledErrors)
         .add(message.withLocation(fileUri, charOffset));
   }
 
-  void deprecated_addCompileTimeError(
-      Uri fileUri, int charOffset, String message,
-      {bool silent: false, bool wasHandled: false}) {
-    if (!silent) {
-      deprecated_printUnexpected(fileUri, charOffset, message);
-    }
-    (wasHandled ? handledErrors : unhandledErrors).add(templateUnspecified
-        .withArguments(message)
-        .withLocation(fileUri, charOffset));
-  }
-
   Builder getAbstractClassInstantiationError() {
     return target.getAbstractClassInstantiationError(this);
   }
 
   Builder getCompileTimeError() => target.getCompileTimeError(this);
 
   Builder getDuplicatedFieldInitializerError() {
     return target.getDuplicatedFieldInitializerError(this);
   }
 
   Builder getNativeAnnotation() => target.getNativeAnnotation(this);
 }
 
 String format(double d, int fractionDigits, int width) {
   return d.toStringAsFixed(fractionDigits).padLeft(width);
 }