Add new SplitString backend.

base/strings/string_util_constants.cc

 // Copyright 2013 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/strings/string_util.h"
 
 namespace base {
 
 #define WHITESPACE_UNICODE \
   0x0009, /* CHARACTER TABULATION */      \
@@ skipping 34 matching lines @@
 const char kWhitespaceASCII[] = {
   0x09,    // CHARACTER TABULATION
   0x0A,    // LINE FEED (LF)
   0x0B,    // LINE TABULATION
   0x0C,    // FORM FEED (FF)
   0x0D,    // CARRIAGE RETURN (CR)
   0x20,    // SPACE
   0
 };
 
+const char16 kWhitespaceASCIIAs16[] = {
+  0x09,    // CHARACTER TABULATION
+  0x0A,    // LINE FEED (LF)
+  0x0B,    // LINE TABULATION
+  0x0C,    // FORM FEED (FF)
+  0x0D,    // CARRIAGE RETURN (CR)
+  0x20,    // SPACE
+  0
+};
+
 const char kUtf8ByteOrderMark[] = "\xEF\xBB\xBF";
 
 }  // namespace base