Remove some deprecated file_util wstring functions.

net/tools/crash_cache/crash_cache.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.
 
 // This command-line program generates the set of files needed for the crash-
 // cache unit tests (DiskCacheTest,CacheBackend_Recover*). This program only
 // works properly on debug mode, because the crash functionality is not compiled
 // on release builds of the cache.
 
 #include <string>
@@ skipping 93 matching lines @@
     L"remove_load1",
     L"remove_load2",
     L"remove_load3"
   };
   COMPILE_ASSERT(arraysize(folders) == disk_cache::MAX_CRASH, sync_folders);
   DCHECK(action > disk_cache::NO_CRASH && action < disk_cache::MAX_CRASH);
 
   *full_path = path;
   file_util::AppendToPath(full_path, folders[action]);
 
-  if (file_util::PathExists(*full_path))
+  if (file_util::PathExists(FilePath::FromWStringHack(*full_path)))
     return false;
 
   return file_util::CreateDirectory(*full_path);
 }
 
 // Generates the files for an empty and one item cache.
 int SimpleInsert(const std::wstring& path, RankCrashes action) {
   disk_cache::Backend* cache = disk_cache::CreateCacheBackend(path, false, 0,
                                                               net::DISK_CACHE);
   if (!cache || cache->GetEntryCount())
@@ skipping 178 matching lines @@
 
   FilePath path;
   PathService::Get(base::DIR_SOURCE_ROOT, &path);
   path = path.AppendASCII("net");
   path = path.AppendASCII("data");
   path = path.AppendASCII("cache_tests");
   path = path.AppendASCII("new_crashes");
 
   return SlaveCode(path.ToWStringHack(), action);
 }