Add utf_string_conversions to base namespace.

chrome/browser/parsers/metadata_parser_jpeg_factory.cc

 // 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.
 
 #include "chrome/browser/parsers/metadata_parser_jpeg_factory.h"
 
 #include "base/files/file_path.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/parsers/metadata_parser_jpeg.h"
 
 MetadataParserJpegFactory::MetadataParserJpegFactory()
     : MetadataParserFactory() {
 }
 
 bool MetadataParserJpegFactory::CanParse(const base::FilePath& path,
                                          char* bytes,
                                          int bytes_size) {
 #if defined(OS_WIN)
-  base::FilePath::StringType ext = UTF8ToWide(std::string(".jpg"));
+  base::FilePath::StringType ext = base::UTF8ToWide(std::string(".jpg"));
 #elif defined(OS_POSIX)
   base::FilePath::StringType ext = ".jpg";
 #endif
   return path.MatchesExtension(ext);
 }
 
 MetadataParser* MetadataParserJpegFactory::CreateParser(
     const base::FilePath& path) {
   JpegMetadataParser* parser;
   parser = new JpegMetadataParser(path);
   return parser;
 }