Add a new switch: --allow-scripts-to-close-windows....

webkit/glue/webpreferences.h

 // Copyright (c) 2006-2008 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.
 //
 // A struct for managing webkit's settings.
 //
 // Adding new values to this class probably involves updating
 // WebViewImpl::SetPreferences, common/render_messages.h, and
 // browser/profile.cc.
 
@@ skipping 19 matching lines @@
   bool javascript_can_open_windows_automatically;
   bool loads_images_automatically;
   bool plugins_enabled;
   bool dom_paste_enabled;
   bool developer_extras_enabled;
   bool shrinks_standalone_images_to_fit;
   bool uses_universal_detector;
   bool text_areas_are_resizable;
   bool dashboard_compatibility_mode;
   bool java_enabled;
+  bool allow_scripts_to_close_windows;
 
   // TODO(tc): User style sheets will not work in chrome because it tries to
   // load the style sheet using a request without a frame.
   bool user_style_sheet_enabled;
   GURL user_style_sheet_location;
 
   std::string user_agent;
 
   // We try to keep the default values the same as the default values in
   // chrome, except for the cases where it would require lots of extra work for
@@ skipping 14 matching lines @@
         javascript_can_open_windows_automatically(true),
         loads_images_automatically(true),
         plugins_enabled(true),
         dom_paste_enabled(false),  // enables execCommand("paste")
         developer_extras_enabled(false),  // Requires extra work by embedder
         shrinks_standalone_images_to_fit(true),
         uses_universal_detector(false),  // Disabled: page cycler regression
         text_areas_are_resizable(true),
         dashboard_compatibility_mode(false),
         java_enabled(true),
-        user_style_sheet_enabled(false) {
+        user_style_sheet_enabled(false),
+        allow_scripts_to_close_windows(false) {
   }
 };
 
 #endif  // WEBKIT_GLUE_WEBPREFERENCES_H__