Settings Router Refactor: Migrate to settings.Route.navigateTo calls.

chrome/browser/resources/settings/settings_page/settings_animated_pages.js

Index: chrome/browser/resources/settings/settings_page/settings_animated_pages.js
diff --git a/chrome/browser/resources/settings/settings_page/settings_animated_pages.js b/chrome/browser/resources/settings/settings_page/settings_animated_pages.js
index c12168e0609909b5956094c168351b9d2a1fa1f2..34ce3f0c86c37dbb31b2af2096afae3a7f066960 100644
--- a/chrome/browser/resources/settings/settings_page/settings_animated_pages.js
+++ b/chrome/browser/resources/settings/settings_page/settings_animated_pages.js
@@ -46,10 +46,7 @@ Polymer({
         this.lightDomChanged_.bind(this));
 
     this.addEventListener('subpage-back', function() {
-      assert(this.currentRoute.section == this.section);
-      assert(this.currentRoute.subpage.length >= 1);
-
-      this.setSubpageChain(this.currentRoute.subpage.slice(0, -1));
+      settings.navigateTo(this.currentRoute.parent);
     }.bind(this));
   },
 
@@ -141,24 +138,4 @@ Polymer({
     template.if = true;
     template.render();
   },
-
-  /**
-   * Buttons in this pageset should use this method to transition to subpages.
-   * @param {!Array<string>} subpage The chain of subpages within the page.
-   */
-  setSubpageChain: function(subpage) {
-    var node = window.event.currentTarget;
-    var page;
-    while (node) {
-      if (node.dataset && node.dataset.page)
-        page = node.dataset.page;
-      // A shadow root has a |host| rather than a |parentNode|.
-      node = node.host || node.parentNode;
-    }
-    this.currentRoute = {
-      page: page,
-      section: subpage.length > 0 ? this.section : '',
-      subpage: subpage,
-    };
-  },
 });