Add a command line option --disable-web-security. People can use this option...

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.
 
 #ifndef WEBKIT_GLUE_WEBPREFERENCES_H__
 #define WEBKIT_GLUE_WEBPREFERENCES_H__
 
 #include <string>
 #include "googleurl/src/gurl.h"
 
 struct WebPreferences {
   std::wstring standard_font_family;
   std::wstring fixed_font_family;
   std::wstring serif_font_family;
   std::wstring sans_serif_font_family;
   std::wstring cursive_font_family;
   std::wstring fantasy_font_family;
   int default_font_size;
   int default_fixed_font_size;
   int minimum_font_size;
   int minimum_logical_font_size;
   std::wstring default_encoding;
   bool javascript_enabled;
+  bool web_security_enabled;
   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 java_enabled;
   bool allow_scripts_to_close_windows;
@@ skipping 13 matching lines @@
         serif_font_family(L"Times New Roman"),
         sans_serif_font_family(L"Arial"),
         cursive_font_family(L"Script"),
         fantasy_font_family(),  // Not sure what to use on Windows.
         default_font_size(16),
         default_fixed_font_size(13),
         minimum_font_size(1),
         minimum_logical_font_size(6),
         default_encoding(L"ISO-8859-1"),
         javascript_enabled(true),
+        web_security_enabled(true),
         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),
         java_enabled(true),
         allow_scripts_to_close_windows(false),
         uses_page_cache(false),
         user_style_sheet_enabled(false) {
   }
 };
 
 #endif  // WEBKIT_GLUE_WEBPREFERENCES_H__