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

chrome/browser/resources/sync_setup_overlay.html

 <div id="sync-setup-overlay" class="page" hidden>
   <div class="close-button"></div>
   <div id="sync-setup-configure" hidden>
     <div id="confirm-sync-preferences">
       <h1 i18n-content="confirmSyncPreferences"></h1>
       <div id="sync-instructions-container" class="content-area">
         <span i18n-content="chooseDataTypesInstructions"></span>
         <a id="encryption-help-link" target="_blank"
             i18n-values="href:syncEverythingHelpURL" i18n-content="learnMore">
         </a>
@@ skipping 202 matching lines @@
       <span i18n-content="syncSetupTimeoutContent"></span>
     </div>
     <div class="action-area button-strip">
       <button id="timeout-ok" i18n-content="ok"></button>
     </div>
   </div>
   <div id="sync-setup-stop-syncing" hidden>
     <h1 i18n-content="stopSyncingTitle"></h1>
     <div class="content-area">
       <span i18n-values=".innerHTML:stopSyncingExplanation"></span>
+<if expr="(not chromeos and is_posix) or is_win or is_macosx">
+      <div id="sync-setup-delete-profile" class="checkbox">
+        <label>
+          <input id="delete-profile" type="checkbox">
+          <span i18n-content="deleteProfileLabel"></span>
+        </label>
+      </div>
+</if>
     </div>
     <div class="action-area button-strip">
       <input id="stop-syncing-cancel" type="button"
           i18n-values="value:cancel">
       <input id="stop-syncing-ok" type="button"
           i18n-values="value:stopSyncingConfirm">
     </div>
   </div>
 </div>