Make undefined Unicode characters show up in a nicer way in braille.

third_party/liblouis/nacl_wrapper/liblouis_instance.h

 // Copyright 2013 Google Inc.
 //
 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
 // use this file except in compliance with the License. You may obtain a copy of
 // the License at
 //
 // http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
@@ skipping 42 matching lines @@
 
   // Posts an error response to JavaScript, with the message ID of the call
   // which caused it.
   void PostError(const std::string& error, const std::string& in_reply_to);
 
   // Parses and executes a table check command.
   void HandleCheckTable(const Json::Value& message,
       const std::string& message_id);
 
   // Called to check a table on a background thread.
-  void CheckTableInBackground(int32_t result, const std::string& table_name,
+  void CheckTableInBackground(int32_t result, const std::string& table_names,
       const std::string& message_id);
 
   // Parses and executes a translation command.
   void HandleTranslate(const Json::Value& message,
       const std::string& message_id);
 
   // Called to translate text on a background thread.
   void TranslateInBackground(int32_t result, const TranslationParams& params,
       const std::string& message_id);
 
   // Parses and executes a back translation command.
   void HandleBackTranslate(const Json::Value& message,
       const std::string& message_id);
 
   // Called to back-translate text on a background thread.
   void BackTranslateInBackground(int32_t result,
-      const std::string& table_name, const std::vector<unsigned char>& cells,
+      const std::string& table_names, const std::vector<unsigned char>& cells,
       const std::string& message_id);
 
   LibLouisWrapper liblouis_;
   pp::SimpleThread liblouis_thread_;
   pp::CompletionCallbackFactory<LibLouisInstance> cc_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LibLouisInstance);
 };
 
 }  // namespace liblouis_nacl
 
 #endif  // LIBLOUIS_NACL_LIBLOUIS_INSTANCE_H_