Settings: Remove /advanced usage as URL.

chrome/browser/resources/settings/route.js

Index: chrome/browser/resources/settings/route.js
diff --git a/chrome/browser/resources/settings/route.js b/chrome/browser/resources/settings/route.js
index ec097c22c568cccce66fe0f156f8620d88b04298..78fd1ee6bfeecc07e78160b5e063f039f520f507 100644
--- a/chrome/browser/resources/settings/route.js
+++ b/chrome/browser/resources/settings/route.js
@@ -266,7 +266,8 @@ cr.define('settings', function() {
     initializeRouteFromUrlCalled_ = true;
 
     var route = getRouteForPath(window.location.pathname);
-    if (route) {
+    // Never allow direct navigation to ADVANCED.
+    if (route && route != Route.ADVANCED) {

[dschuyler, 2016/08/17 22:54:12]

Can we drop advanced altogether? I added it as
part of MD settings. So there shouldn't be any
legacy to support.

[tommycli, 2016/08/17 23:56:25]

Can't easily drop it. It's needed to do all the ADVANCED.contains(Route.foo)
tests. We could add a separate list of Advanced routes, but it would be more
cumbersome than just keeping it as a 'virtual' route.

       currentRoute_ = route;
       currentQueryParameters_ = new URLSearchParams(window.location.search);
     } else {