Sync UI: Remove the StopSyncingHandler.

chrome/browser/resources/sync_setup_overlay.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 cr.define('options', function() {
   /** @const */ var OptionsPage = options.OptionsPage;
 
   // Variable to track if a captcha challenge was issued. If this gets set to
   // true, it stays that way until we are told about successful login from
   // the browser.  This means subsequent errors (like invalid password) are
@@ skipping 41 matching lines @@
           $('sync-setup-cancel').onclick =
           $('confirm-everything-cancel').onclick =
           $('stop-syncing-cancel').onclick =
           $('sync-spinner-cancel').onclick = function() {
         self.closeOverlay_();
       };
       $('confirm-everything-ok').onclick = function() {
         self.sendConfiguration_();
       };
       $('stop-syncing-ok').onclick = function() {
-        chrome.send('stopSyncing');
+        chrome.send('SyncSetupStopSyncing');
         self.closeOverlay_();
       };
     },
 
     showOverlay_: function() {
       OptionsPage.navigateToPage('syncSetup');
     },
 
     closeOverlay_: function() {
       OptionsPage.closeOverlay();
@@ skipping 815 matching lines @@
 
   SyncSetupOverlay.showStopSyncingUI = function() {
     SyncSetupOverlay.getInstance().showStopSyncingUI_();
   };
 
   // Export
   return {
     SyncSetupOverlay: SyncSetupOverlay
   };
 });