Issue 71980: Extensions code should use UTF-16 for user-visible Unicode strings

chrome/common/extensions/extension_error_utils.h

 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_ERROR_UTILS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_ERROR_UTILS_H_
 #pragma once
 
 #include <string>
 
+#include "base/string16.h"
+
 class ExtensionErrorUtils {
  public:
   // Creates an error messages from a pattern.
   static std::string FormatErrorMessage(const std::string& format,
-    const std::string& s1);
+                                        const std::string& s1);
 
   static std::string FormatErrorMessage(const std::string& format,
-    const std::string& s1,
-    const std::string& s2);
+                                        const std::string& s1,
+                                        const std::string& s2);
 
   static std::string FormatErrorMessage(const std::string& format,
-    const std::string& s1,
-    const std::string& s2,
-    const std::string& s3);
+                                        const std::string& s1,
+                                        const std::string& s2,
+                                        const std::string& s3);
+
+  static string16 FormatErrorMessageUTF16(const std::string& format,
+                                          const std::string& s1);
+
+  static string16 FormatErrorMessageUTF16(const std::string& format,
+                                          const std::string& s1,
+                                          const std::string& s2);
+
+  static string16 FormatErrorMessageUTF16(const std::string& format,
+                                          const std::string& s1,
+                                          const std::string& s2,
+                                          const std::string& s3);
 };
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_ERROR_UTILS_H_