wstring: remove SplitStringAlongWhitespace for wchar

base/string_split.cc

 // 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.
 
 #include "base/string_split.h"
 
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/third_party/icu/icu_utf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 182 matching lines @@
         }
         break;
     }
   }
   if (!last_was_ws) {
     result->push_back(
         str.substr(last_non_ws_start, length - last_non_ws_start));
   }
 }
 
-void SplitStringAlongWhitespace(const std::wstring& str,
-                                std::vector<std::wstring>* result) {
-  SplitStringAlongWhitespaceT(str, result);
-}
-
-#if !defined(WCHAR_T_IS_UTF16)
 void SplitStringAlongWhitespace(const string16& str,
                                 std::vector<string16>* result) {
   SplitStringAlongWhitespaceT(str, result);
 }
-#endif
 
 void SplitStringAlongWhitespace(const std::string& str,
                                 std::vector<std::string>* result) {
   SplitStringAlongWhitespaceT(str, result);
 }
 
 }  // namespace base