Modify the "dangerous download" algorithm as follows. Original patch by Pier...

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 929 matching lines @@
         'browser/dom_ui/slideshow_ui.cc',
         'browser/dom_ui/slideshow_ui.h',
         'browser/dom_ui/textfields_ui.cc',
         'browser/dom_ui/textfields_ui.h',
         'browser/dom_ui/tips_handler.cc',
         'browser/dom_ui/tips_handler.h',
         'browser/dom_ui/value_helper.cc',
         'browser/dom_ui/value_helper.h',
         'browser/download/base_file.cc',
         'browser/download/base_file.h',
-        'browser/download/download_exe.cc',
+        'browser/download/download_extensions.cc',
+        'browser/download/download_extensions.h',
         'browser/download/download_file.cc',
         'browser/download/download_file.h',
         'browser/download/download_file_manager.cc',
         'browser/download/download_file_manager.h',
         'browser/download/download_history.cc',
         'browser/download/download_history.h',
         'browser/download/download_item.cc',
         'browser/download/download_item.h',
         'browser/download/download_item_model.cc',
         'browser/download/download_item_model.h',
@@ skipping 3412 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: