Introduce UrlPattern.

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 <string>
@@ skipping 476 matching lines @@
                  std::vector<std::string>* r);
 
 // The same as SplitString, but don't trim white space.
 void SplitStringDontTrim(const std::wstring& str,
                          wchar_t s,
                          std::vector<std::wstring>* r);
 void SplitStringDontTrim(const std::string& str,
                          char s,
                          std::vector<std::string>* r);
 
+// Does the opposite of SplitString().
+std::wstring JoinString(const std::vector<std::wstring>& parts, wchar_t s);
+std::string JoinString(const std::vector<std::string>& parts, char s);
+
 // 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.
 void SplitStringAlongWhitespace(const std::wstring& str,
                                 std::vector<std::wstring>* result);
@@ skipping 42 matching lines @@
 // Returns a hex string representation of a binary buffer.
 // The returned hex string will be in upper case.
 // This function does not check if |size| is within reasonable limits since
 // it's written with trusted data in mind.
 // If you suspect that the data you want to format might be large,
 // the absolute max size for |size| should be is
 //   std::numeric_limits<size_t>::max() / 2
 std::string HexEncode(const void* bytes, size_t size);
 
 #endif  // BASE_STRING_UTIL_H_