Use FilePath::DirName instead of the deprecated file_util::GetDirectoryFromPath.

base/file_util_deprecated.h

 // Copyright (c) 2011 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.
 
 // We're trying to transition away from paths as wstrings into using
 // FilePath objects.  This file contains declarations of deprecated
 // functions.  By hiding them here rather in the main header, we hope
 // to discourage callers.
 
 // See file_util.h for documentation on all functions that don't have
 // documentation here.
 
 #ifndef BASE_FILE_UTIL_DEPRECATED_H_
 #define BASE_FILE_UTIL_DEPRECATED_H_
 #pragma once
 
 #include "build/build_config.h"
 
 // We've successfully deprecated all of these functions on non-Windows
 // platforms.
 
 #if defined(OS_WIN)
 
 namespace file_util {
 
 // Use the FilePath versions instead.
 FILE* OpenFile(const std::string& filename, const char* mode);
 FILE* OpenFile(const std::wstring& filename, const char* mode);
 
-// Returns the directory component of a path, without the trailing
-// path separator, or an empty string on error. The function does not
-// check for the existence of the path, so if it is passed a directory
-// without the trailing \, it will interpret the last component of the
-// path as a file and chomp it. This does not support relative paths.
-// Examples:
-// path == "C:\pics\jojo.jpg",     returns "C:\pics"
-// path == "C:\Windows\system32\", returns "C:\Windows\system32"
-// path == "C:\Windows\system32",  returns "C:\Windows"
-// Deprecated. Use FilePath's DirName() instead.
-std::wstring GetDirectoryFromPath(const std::wstring& path);
-
 // Appends new_ending to path, adding a separator between the two if necessary.
 void AppendToPath(std::wstring* path, const std::wstring& new_ending);
 
 // Use FilePath::Extension instead.
 FilePath::StringType GetFileExtensionFromPath(const FilePath& path);
 std::wstring GetFileExtensionFromPath(const std::wstring& path);
 
 // Use version that takes a FilePath.
 bool Delete(const std::wstring& path, bool recursive);
 bool CopyDirectory(const std::wstring& from_path, const std::wstring& to_path,
                    bool recursive);
 int ReadFile(const std::wstring& filename, char* data, int size);
 int WriteFile(const std::wstring& filename, const char* data, int size);
 
 }
 
 #endif  // OS_WIN
 
 #endif  // BASE_FILE_UTIL_DEPRECATED_H_