IsStringUTF8 unittest and enforcing UTF-8 in JSON deserialization

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 204 matching lines @@
 
 // Converts the given wide string to the corresponding Latin1. This will fail
 // (return false) if any characters are more than 255.
 bool WideToLatin1(const std::wstring& wide, std::string* latin1);
 
 // Returns true if the specified string matches the criteria. How can a wide
 // string be 8-bit or UTF8? It contains only characters that are < 256 (in the
 // first case) or characters that use only 8-bits and whose 8-bit
 // representation looks like a UTF-8 string (the second case).
 bool IsString8Bit(const std::wstring& str);
-bool IsStringUTF8(const char* str);
-bool IsStringWideUTF8(const wchar_t* str);
+bool IsStringUTF8(const std::string& str);
+bool IsStringWideUTF8(const std::wstring& str);
 bool IsStringASCII(const std::wstring& str);
 bool IsStringASCII(const std::string& str);
 
 // ASCII-specific tolower.  The standard library's tolower is locale sensitive,
 // so we don't want to use it here.
 template <class Char> inline Char ToLowerASCII(Char c) {
   return (c >= 'A' && c <= 'Z') ? (c + ('a' - 'A')) : c;
 }
 
 // Converts the elements of the given string.  This version uses a pointer to
@@ skipping 269 matching lines @@
 // Returns true if the string passed in matches the pattern. The pattern
 // string can contain wildcards like * and ?
 // TODO(iyengar) This function may not work correctly for CJK strings as
 // it does individual character matches.
 // The backslash character (\) is an escape character for * and ?
 bool MatchPattern(const std::wstring& string, const std::wstring& pattern);
 bool MatchPattern(const std::string& string, const std::string& pattern);
 
 #endif  // BASE_STRING_UTIL_H_