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

base/file_util_win.cc

Index: base/file_util_win.cc
diff --git a/base/file_util_win.cc b/base/file_util_win.cc
index 9ab96c09a5f7c1bfaac9654ebd139b3c02091382..7476b53765b984e05e1e0a252d7e9e968dddc5a1 100644
--- a/base/file_util_win.cc
+++ b/base/file_util_win.cc
@@ -77,19 +77,6 @@ bool DevicePathToDriveLetterPath(const FilePath& device_path,
 
 }  // namespace
 
-std::wstring GetDirectoryFromPath(const std::wstring& path) {
-  base::ThreadRestrictions::AssertIOAllowed();
-  wchar_t path_buffer[MAX_PATH];
-  wchar_t* file_ptr = NULL;
-  if (GetFullPathName(path.c_str(), MAX_PATH, path_buffer, &file_ptr) == 0)
-    return L"";
-
-  std::wstring::size_type length =
-      file_ptr ? file_ptr - path_buffer : path.length();
-  std::wstring directory(path, 0, length);
-  return FilePath(directory).StripTrailingSeparators().value();
-}
-
 bool AbsolutePath(FilePath* path) {
   base::ThreadRestrictions::AssertIOAllowed();
   wchar_t file_path_buf[MAX_PATH];