MD Settings: Lazy load the contents of the "advanced" settings.

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 7d02247ac41f455d75716f19944950db897666bd..5bfdd5958d8d0d895307f50a1875209cb7f7cae8 100644
--- a/chrome/browser/resources/settings/route.js
+++ b/chrome/browser/resources/settings/route.js
@@ -100,6 +100,14 @@ cr.define('settings', function() {
   r.TRIGGERED_RESET_DIALOG =
       r.ADVANCED.createChild('/triggeredResetProfileSettings');
 
+  var navigableDialogs = new Set([
+    r.CLEAR_BROWSER_DATA,
+    r.IMPORT_DATA,
+    r.RESET_DIALOG,
+    r.SIGN_OUT,
+    r.TRIGGERED_RESET_DIALOG,
+  ]);

[tommycli, 2017/03/21 16:44:57]

the isNavigableDialog thing is fine. I may suggest instead making it a property
of the route itself that defaults ta false... i.e.

if (route.isNavigableDialog) -- just so it's declared in the line right after
the route (so it's impossible to miss putting it in the Set), but it's not a
huge deal either way.

[dpapad, 2017/03/21 17:54:15]

Done.

+
 // <if expr="chromeos">
   r.INTERNET = r.BASIC.createSection('/internet', 'internet');
   r.INTERNET_NETWORKS = r.INTERNET.createChild('/networks');
@@ -397,6 +405,15 @@ cr.define('settings', function() {
                     new URLSearchParams(window.location.search), true);
   });
 
+  /**
+   * @param {!Route}

[Dan Beam, 2017/03/21 08:16:12]

@param {!Route} route

[dpapad, 2017/03/21 17:54:15]

Done.

+   * @return {boolean} Whether the given route corresponds to a navigable
+   *     dialog. Those routes don't belong to a "section".
+   */
+  function isNavigableDialog(route) {
+    return navigableDialogs.has(route);
+  }
+
   return {
     Route: Route,
     RouteObserverBehavior: RouteObserverBehavior,
@@ -408,5 +425,6 @@ cr.define('settings', function() {
     lastRouteChangeWasPopstate: lastRouteChangeWasPopstate,
     navigateTo: navigateTo,
     navigateToPreviousRoute: navigateToPreviousRoute,
+    isNavigableDialog: isNavigableDialog,
   };
 });