Move directory creation functions to base namespace.

ui/surface/accelerated_surface_transformer_win_unittest.cc

Index: ui/surface/accelerated_surface_transformer_win_unittest.cc
diff --git a/ui/surface/accelerated_surface_transformer_win_unittest.cc b/ui/surface/accelerated_surface_transformer_win_unittest.cc
index 67460ad968eb1f6517c8d615506a3c63b7c835d3..968720fe068dce1440e6312c3a7d90e603f62193 100644
--- a/ui/surface/accelerated_surface_transformer_win_unittest.cc
+++ b/ui/surface/accelerated_surface_transformer_win_unittest.cc
@@ -75,7 +75,7 @@ bool WritePNGFile(const SkBitmap& bitmap, const base::FilePath& file_path) {
   if (gfx::PNGCodec::EncodeBGRASkBitmap(bitmap,
                                         discard_transparency,
                                         &png_data) &&
-      file_util::CreateDirectory(file_path.DirName())) {
+      base::CreateDirectory(file_path.DirName())) {
     char* data = reinterpret_cast<char*>(&png_data[0]);
     int size = static_cast<int>(png_data.size());
     return file_util::WriteFile(file_path, data, size) == size;