For downloads requiring a user gesture, also require...

chrome/browser/download/download_create_info.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 77 matching lines @@
   // may be different from |mime_type|, which may be set based on heuristics
   // which may look at the file extension and first few bytes of the file.
   std::string original_mime_type;
 
   // True if we should display the 'save as...' UI and prompt the user
   // for the download location.
   // False if the UI should be supressed and the download performed to the
   // default location.
   bool prompt_user_for_save_location;
 
-  // Whether this download file is potentially dangerous (ex: exe, dll, ...).
-  bool is_dangerous_file;
-
-  // If safebrowsing believes this URL leads to malware.
-  bool is_dangerous_url;
-
   // The original name for a dangerous download.
   FilePath original_name;
 
   // Whether this download is for extension install or not.
   bool is_extension_install;
 
   // The charset of the referring page where the download request comes from.
   // It's used to construct a suggested filename.
   std::string referrer_charset;
 
   // The download file save info.
   DownloadSaveInfo save_info;
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_CREATE_INFO_H_