Initial implementation of the <extensionoptions> GuestView tag

extensions/renderer/dispatcher.cc

Index: extensions/renderer/dispatcher.cc
diff --git a/extensions/renderer/dispatcher.cc b/extensions/renderer/dispatcher.cc
index fa242177fa2341141849ce945ff916f1a5f9a356..289f58d582145304fea736d3e010046387b2158e 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -799,10 +799,13 @@ void Dispatcher::UpdateOriginPermissions(const Extension* extension) {
 }
 
 void Dispatcher::EnableCustomElementWhiteList() {
-  blink::WebCustomElement::addEmbedderCustomElementName("webview");
-  blink::WebCustomElement::addEmbedderCustomElementName("appview");
   blink::WebCustomElement::addEmbedderCustomElementName("appplugin");
+  blink::WebCustomElement::addEmbedderCustomElementName("appview");
   blink::WebCustomElement::addEmbedderCustomElementName("browserplugin");
+  blink::WebCustomElement::addEmbedderCustomElementName("extensionoptions");
+  blink::WebCustomElement::addEmbedderCustomElementName(
+      "extensionoptionsplugin");
+  blink::WebCustomElement::addEmbedderCustomElementName("webview");
 }
 
 void Dispatcher::UpdateBindings(const std::string& extension_id) {