Disable the XSS Auditor by default for 4.1....

chrome/browser/tab_contents/render_view_host_delegate_helper.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/tab_contents/render_view_host_delegate_helper.h"
 
 #include "base/command_line.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/character_encoding.h"
@@ skipping 157 matching lines @@
         !command_line.HasSwitch(switches::kDisableJava) &&
         prefs->GetBoolean(prefs::kWebKitJavaEnabled);
     web_prefs.loads_images_automatically =
         !command_line.HasSwitch(switches::kDisableImages) &&
         prefs->GetBoolean(prefs::kWebKitLoadsImagesAutomatically);
     web_prefs.uses_page_cache =
         command_line.HasSwitch(switches::kEnableFastback);
     web_prefs.remote_fonts_enabled =
         !command_line.HasSwitch(switches::kDisableRemoteFonts);
     web_prefs.xss_auditor_enabled =
-        !command_line.HasSwitch(switches::kDisableXSSAuditor);
+        command_line.HasSwitch(switches::kEnableXSSAuditor);
     web_prefs.application_cache_enabled =
         command_line.HasSwitch(switches::kEnableApplicationCache);
 
     web_prefs.local_storage_enabled =
       !command_line.HasSwitch(switches::kDisableLocalStorage);
     web_prefs.databases_enabled =
       !command_line.HasSwitch(switches::kDisableDatabases);
     web_prefs.experimental_webgl_enabled =
       command_line.HasSwitch(switches::kEnableExperimentalWebGL);
     web_prefs.site_specific_quirks_enabled =
@@ skipping 19 matching lines @@
   }
   DCHECK(!web_prefs.default_encoding.empty());
 
   if (is_dom_ui) {
     web_prefs.loads_images_automatically = true;
     web_prefs.javascript_enabled = true;
   }
 
   return web_prefs;
 }