Enable "Hide Extension" option when "Save Link As" on the Mac

chrome/browser/download/download_target_info.h

Index: chrome/browser/download/download_target_info.h
diff --git a/chrome/browser/download/download_target_info.h b/chrome/browser/download/download_target_info.h
index 8380560e146c8aca48a08d6a05bbc01cf9eaf05c..4f4f776b403252646049b51e0a7aabffda809df9 100644
--- a/chrome/browser/download/download_target_info.h
+++ b/chrome/browser/download/download_target_info.h
@@ -53,6 +53,10 @@ struct DownloadTargetInfo {
   // opens should be handled. The file is considered to be handled safely if the
   // filetype is supported by the renderer or a sandboxed plugin.
   bool is_filetype_handled_safely;
+
+  // Whether |target_path| should be configured to hide its file extesnion in
+  // the Finder (MacOSX).
+  bool hide_file_extension;
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_TARGET_INFO_H_