Remove per-tab preference machinery.

webkit/glue/webpreferences.cc

Index: webkit/glue/webpreferences.cc
diff --git a/webkit/glue/webpreferences.cc b/webkit/glue/webpreferences.cc
index 3e2737c7c06bf6f180929371e833fc68f4f26c5c..a69a42a8103b2134ab5cca440e023eb61622c5e3 100644
--- a/webkit/glue/webpreferences.cc
+++ b/webkit/glue/webpreferences.cc
@@ -42,7 +42,6 @@ WebPreferences::WebPreferences()
       web_security_enabled(true),
       javascript_can_open_windows_automatically(true),
       loads_images_automatically(true),
-      images_enabled(true),
       plugins_enabled(true),
       dom_paste_enabled(false),  // enables execCommand("paste")
       developer_extras_enabled(false),  // Requires extra work by embedder
@@ -55,7 +54,7 @@ WebPreferences::WebPreferences()
       uses_page_cache(false),
       remote_fonts_enabled(true),
       javascript_can_access_clipboard(false),
-      xss_auditor_enabled(true),
+      xss_auditor_enabled(false),
       dns_prefetching_enabled(true),
       local_storage_enabled(false),
       databases_enabled(false),
@@ -194,7 +193,6 @@ void WebPreferences::Apply(WebView* web_view) const {
   settings->setJavaScriptCanOpenWindowsAutomatically(
       javascript_can_open_windows_automatically);
   settings->setLoadsImagesAutomatically(loads_images_automatically);
-  settings->setImagesEnabled(images_enabled);
   settings->setPluginsEnabled(plugins_enabled);
   settings->setDOMPasteAllowed(dom_paste_enabled);
   settings->setDeveloperExtrasEnabled(developer_extras_enabled);