base: Move SplitStringDontTrim functions from string_util.h to string_split.h

base/string_split.h

 // Copyright (c) 2010 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 15 matching lines @@
     std::vector<std::pair<std::string, std::string> >* kv_pairs);
 
 // The same as SplitString, but use a substring delimiter instead of a char.
 void SplitStringUsingSubstr(const string16& str,
                             const string16& s,
                             std::vector<string16>* r);
 void SplitStringUsingSubstr(const std::string& str,
                             const std::string& s,
                             std::vector<std::string>* r);
 
+// The same as SplitString, but don't trim white space.
+// Where wchar_t is char16 (i.e. Windows), |c| must be in BMP
+// (Basic Multilingual Plane). Elsewhere (Linux/Mac), wchar_t
+// should be a valid Unicode code point (32-bit).
+void SplitStringDontTrim(const std::wstring& str,
+                         wchar_t c,
+                         std::vector<std::wstring>* r);
+// NOTE: |c| must be in BMP (Basic Multilingual Plane)
+void SplitStringDontTrim(const string16& str,
+                         char16 c,
+                         std::vector<string16>* r);
+// |str| should not be in a multi-byte encoding like Shift-JIS or GBK in which
+// the trailing byte of a multi-byte character can be in the ASCII range.
+// UTF-8, and other single/multi-byte ASCII-compatible encodings are OK.
+// Note: |c| must be in the ASCII range.
+void SplitStringDontTrim(const std::string& str,
+                         char c,
+                         std::vector<std::string>* r);
+
 }  // namespace base
 
 #endif  // BASE_STRING_SPLIT_H