Convert some tools to use FilePaths for file names.

chrome/tools/convert_dict/dic_reader.cc

 // 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.
 
 #include "chrome/tools/convert_dict/dic_reader.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/file_util.h"
@@ skipping 110 matching lines @@
     } else {
       found->second.insert(affix_index);
     }
   }
 
   return true;
 }
 
 }  // namespace
 
-DicReader::DicReader(const std::string& filename) {
-  FilePath path = FilePath::FromWStringHack(ASCIIToWide(filename));
+DicReader::DicReader(const FilePath& path) {
   file_ = file_util::OpenFile(path, "r");
 
   FilePath additional_path =
       path.InsertBeforeExtension(FILE_PATH_LITERAL("_delta"));
   additional_words_file_ = file_util::OpenFile(additional_path, "r");
 }
 
 DicReader::~DicReader() {
   if (file_)
     file_util::CloseFile(file_);
@@ skipping 34 matching lines @@
     std::sort(affixes.begin(), affixes.end());
     words_.push_back(std::make_pair(word->first, affixes));
   }
 
   // Double-check that the words are sorted.
   std::sort(words_.begin(), words_.end());
   return true;
 }
 
 }  // namespace convert_dict