Use FilePaths in content::DropData to avoid redundant conversions.

content/browser/web_contents/web_drag_dest_gtk.cc

Index: content/browser/web_contents/web_drag_dest_gtk.cc
diff --git a/content/browser/web_contents/web_drag_dest_gtk.cc b/content/browser/web_contents/web_drag_dest_gtk.cc
index 0594a2e2b0506416b8f87444639f8aeb769af980..34a61c31d0fb2a51ab3d04bd97926430cce00f47 100644
--- a/content/browser/web_contents/web_drag_dest_gtk.cc
+++ b/content/browser/web_contents/web_drag_dest_gtk.cc
@@ -209,8 +209,7 @@ void WebDragDestGtk::OnDragDataReceived(
           if (url.SchemeIs(kFileScheme) &&
               net::FileURLToFilePath(url, &file_path)) {
             drop_data_->filenames.push_back(
-                DropData::FileInfo(base::UTF8ToUTF16(file_path.value()),
-                                   base::string16()));
+                ui::FileInfo(file_path, base::FilePath()));
             // This is a hack. Some file managers also populate text/plain with
             // a file URL when dragging files, so we clear it to avoid exposing
             // it to the web content.