Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/browser/local_discovery/pwg_raster_converter.cc

Index: chrome/browser/local_discovery/pwg_raster_converter.cc
diff --git a/chrome/browser/local_discovery/pwg_raster_converter.cc b/chrome/browser/local_discovery/pwg_raster_converter.cc
index 2ea9cab3e893751382857fe468559150dbc31e27..ce3e0eaca8119b9d9cf4acee7b4ecd015ea9af25 100644
--- a/chrome/browser/local_discovery/pwg_raster_converter.cc
+++ b/chrome/browser/local_discovery/pwg_raster_converter.cc
@@ -75,9 +75,7 @@ void FileHandlers::Init(base::RefCountedMemory* data) {
   }
 
   if (static_cast<int>(data->size()) !=
-      file_util::WriteFile(GetPdfPath(),
-                           data->front_as<char>(),
-                           data->size())) {
+      base::WriteFile(GetPdfPath(), data->front_as<char>(), data->size())) {
     return;
   }