wstring: remove SplitStringAlongWhitespace for wchar

base/string_split.h

 // Copyright (c) 2011 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 BASE_STRING_SPLIT_H_
 #define BASE_STRING_SPLIT_H_
 #pragma once
 
 #include <string>
 #include <utility>
@@ skipping 54 matching lines @@
                                      std::vector<std::string>* r);
 
 // WARNING: this uses whitespace as defined by the HTML5 spec. If you need
 // a function similar to this but want to trim all types of whitespace, then
 // factor this out into a function that takes a string containing the characters
 // that are treated as whitespace.
 //
 // Splits the string along whitespace (where whitespace is the five space
 // characters defined by HTML 5). Each contiguous block of non-whitespace
 // characters is added to result.
-BASE_EXPORT void SplitStringAlongWhitespace(const std::wstring& str,
-                                            std::vector<std::wstring>* result);
 BASE_EXPORT void SplitStringAlongWhitespace(const string16& str,
                                             std::vector<string16>* result);
 BASE_EXPORT void SplitStringAlongWhitespace(const std::string& str,
                                             std::vector<std::string>* result);
 
 }  // namespace base
 
 #endif  // BASE_STRING_SPLIT_H