wstring: remove wstring method from PlatformFile

base/platform_file_posix.cc

 // Copyright (c) 2009 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 "base/platform_file.h"
 
 #include <fcntl.h>
 #include <errno.h>
 #include <sys/stat.h>
 
@@ skipping 116 matching lines @@
           break;
         default:
           *error_code = PLATFORM_FILE_ERROR_FAILED;
       }
     }
   }
 
   return descriptor;
 }
 
-PlatformFile CreatePlatformFile(const std::wstring& name, int flags,
-                                bool* created) {
-  return CreatePlatformFile(FilePath::FromWStringHack(name), flags,
-                            created, NULL);
-}
-
 bool ClosePlatformFile(PlatformFile file) {
   return !close(file);
 }
 
 int ReadPlatformFile(PlatformFile file, int64 offset, char* data, int size) {
   if (file < 0)
     return -1;
 
   return HANDLE_EINTR(pread(file, data, size, offset));
 }
@@ skipping 36 matching lines @@
   info->is_directory = S_ISDIR(file_info.st_mode);
   info->is_symbolic_link = S_ISLNK(file_info.st_mode);
   info->size = file_info.st_size;
   info->last_modified = base::Time::FromTimeT(file_info.st_mtime);
   info->last_accessed = base::Time::FromTimeT(file_info.st_atime);
   info->creation_time = base::Time::FromTimeT(file_info.st_ctime);
   return true;
 }
 
 }  // namespace base