Add a checkbox on stop-sync dialog to allow user to choose whether to delete

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;
 
   // True if the synced account uses a custom passphrase.
   var usePassphrase_ = false;
 
@@ skipping 65 matching lines @@
         self.closeOverlay_();
       };
       $('confirm-everything-ok').onclick = function() {
         self.sendConfiguration_();
       };
       $('timeout-ok').onclick = function() {
         chrome.send('CloseTimeout');
         self.closeOverlay_();
       };
       $('stop-syncing-ok').onclick = function() {
-        chrome.send('SyncSetupStopSyncing');
+        var deleteProfile = $('delete-profile').checked;
+        chrome.send('SyncSetupStopSyncing', [deleteProfile]);
         self.closeOverlay_();
       };
     },
 
     showOverlay_: function() {
       OptionsPage.navigateToPage('syncSetup');
     },
 
     closeOverlay_: function() {
       this.syncConfigureArgs_ = null;
@@ skipping 680 matching lines @@
 
   SyncSetupOverlay.showStopSyncingUI = function() {
     SyncSetupOverlay.getInstance().showStopSyncingUI_();
   };
 
   // Export
   return {
     SyncSetupOverlay: SyncSetupOverlay
   };
 });