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 fa10b76bec22d6fd57f285c5098db6ee3f61cc82..be09e31f81ef7a14aab3c385e37c5c788c57f955 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -830,10 +830,13 @@ void Dispatcher::UpdateOriginPermissions(
 }
 
 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) {