Re-attempt r28993...

base/string_util.h

 // Copyright (c) 2006-2008 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.
 //
 // This file defines utility functions for working with strings.
 
 #ifndef BASE_STRING_UTIL_H_
 #define BASE_STRING_UTIL_H_
 
 #include <stdarg.h>   // va_list
@@ skipping 102 matching lines @@
 
 // Returns a reference to a globally unique empty string that functions can
 // return.  Use this to avoid static construction of strings, not to replace
 // any and all uses of "std::string()" as nicer-looking sugar.
 // These functions are threadsafe.
 const std::string& EmptyString();
 const std::wstring& EmptyWString();
 const string16& EmptyString16();
 
 extern const wchar_t kWhitespaceWide[];
+extern const char16 kWhitespaceUTF16[];
 extern const char kWhitespaceASCII[];
 
 // Removes characters in trim_chars from the beginning and end of input.
 // NOTE: Safe to use the same variable for both input and output.
 bool TrimString(const std::wstring& input,
                 const wchar_t trim_chars[],
                 std::wstring* output);
+bool TrimString(const string16& input,
+                const char16 trim_chars[],
+                string16* output);
 bool TrimString(const std::string& input,
                 const char trim_chars[],
                 std::string* output);
 
 // Trims any whitespace from either end of the input string.  Returns where
 // whitespace was found.
 // The non-wide version has two functions:
 // * TrimWhitespaceASCII()
 //   This function is for ASCII strings and only looks for ASCII whitespace;
 // Please choose the best one according to your usage.
 // NOTE: Safe to use the same variable for both input and output.
 enum TrimPositions {
   TRIM_NONE     = 0,
   TRIM_LEADING  = 1 << 0,
   TRIM_TRAILING = 1 << 1,
   TRIM_ALL      = TRIM_LEADING | TRIM_TRAILING,
 };
 TrimPositions TrimWhitespace(const std::wstring& input,
                              TrimPositions positions,
                              std::wstring* output);
+TrimPositions TrimWhitespace(const string16& input,
+                             TrimPositions positions,
+                             string16* output);
 TrimPositions TrimWhitespaceASCII(const std::string& input,
                                   TrimPositions positions,
                                   std::string* output);
 
 // Deprecated. This function is only for backward compatibility and calls
 // TrimWhitespaceASCII().
 TrimPositions TrimWhitespace(const std::string& input,
                              TrimPositions positions,
                              std::string* output);
 
@@ skipping 414 matching lines @@
 #elif defined(WCHAR_T_IS_UTF32)
   typedef uint32 Unsigned;
 #endif
 };
 template<>
 struct ToUnsigned<short> {
   typedef unsigned short Unsigned;
 };
 
 #endif  // BASE_STRING_UTIL_H_