[Experiment, do not commit] Try not using WebUI for extensions w/o bindings.

chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc

Index: chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
diff --git a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
index 491c8d48e597060c1111fe812ba4e03cb775caec..27993963b5b186c3a2b789f4a18a99d923845f79 100644
--- a/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
+++ b/chrome/browser/ui/webui/chrome_web_ui_controller_factory.cc
@@ -280,16 +280,7 @@ WebUIController* NewWebUI<WelcomeUI>(WebUI* web_ui, const GURL& url) {
 // Only create ExtensionWebUI for URLs that are allowed extension bindings,
 // hosted by actual tabs.
 bool NeedsExtensionWebUI(Profile* profile, const GURL& url) {
-  if (!profile)
-    return false;
-
-  const extensions::Extension* extension =
-      extensions::ExtensionRegistry::Get(profile)->enabled_extensions().
-          GetExtensionOrAppByURL(url);
-  // Allow bindings for all packaged extensions and component hosted apps.
-  return extension &&
-      (!extension->is_hosted_app() ||
-       extension->location() == extensions::Manifest::COMPONENT);
+  return false;
 }
 #endif