[SyncSetup]: Remove redundant user action.

This CL removes 'Sync_NavigateToSyncAdvancedPage' user action.
As navigation to chrome settings routes are recorded in
'WebUI.Settings.PathVisited' histogram.

Bug: 1050070
Change-Id: Iea2dfc812a78df6c1ad7cb733b972d75d57f0ffa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2115470Reviewed-by: Esmael Elmoslimany <aee@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Monica Basta <msalama@chromium.org>
Cr-Commit-Position: refs/heads/master@{#752818}

chrome/browser/resources/settings/people_page/sync_controls.js

@@ -39,7 +39,7 @@ const RadioButtonNames = {
 Polymer({
   is: 'settings-sync-controls',
 
-  behaviors: [WebUIListenerBehavior, settings.RouteObserverBehavior],
+  behaviors: [WebUIListenerBehavior],
 
   properties: {
     hidden: {
@@ -103,14 +103,6 @@ Polymer({
     }
   },
 
-  /** @protected */
-  currentRouteChanged() {
-    const router = settings.Router.getInstance();
-    if (router.getCurrentRoute() === router.getRoutes().SYNC_ADVANCED) {
-      chrome.metricsPrivate.recordUserAction('Sync_NavigateToSyncAdvancedPage');
-    }
-  },
-
   /**
    * Handler for when the sync preferences are updated.
    * @private

tools/metrics/actions/actions.xml

@@ -22673,6 +22673,10 @@ should be able to be added at any place in this file.
 </action>
 
 <action name="Sync_NavigateToSyncAdvancedPage">
+  <obsolete>
+    Deprecated as of 03/2020. Navigation to settings routes are recorded in
+    WebUI.Settings.PathVisited histogram.
+  </obsolete>
   <owner>msalama@chromium.org</owner>
   <owner>chrome-signin-team@google.com</owner>
   <description>