Remove all calls to domAutomationController.setAutomationId.

components/security_interstitials/core/common/resources/interstitial_common.js

 // Copyright 2017 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.
 
 // This is the shared code for security interstitials. It is used for both SSL
 // interstitials and Safe Browsing interstitials.
 
 // Should match security_interstitials::SecurityInterstitialCommands
 /** @enum| {string} */
 var SecurityInterstitialCommandId = {
@@ skipping 17 matching lines @@
 };
 
 var HIDDEN_CLASS = 'hidden';
 
 /**
  * A convenience method for sending commands to the parent page.
  * @param {string} cmd  The command to send.
  */
 function sendCommand(cmd) {
 // <if expr="not is_ios">
-  window.domAutomationController.setAutomationId(1);
   window.domAutomationController.send(cmd);
 // </if>
 // <if expr="is_ios">
   // TODO(crbug.com/565877): Revisit message passing for WKWebView.
   var iframe = document.createElement('IFRAME');
   iframe.setAttribute('src', 'js-command:' + cmd);
   document.documentElement.appendChild(iframe);
   iframe.parentNode.removeChild(iframe);
 // </if>
 }
 
 /**
  * Call this to stop clicks on <a href="#"> links from scrolling to the top of
  * the page (and possibly showing a # in the link).
  */
 function preventDefaultOnPoundLinkClicks() {
   document.addEventListener('click', function(e) {
     var anchor = findAncestor(/** @type {Node} */ (e.target), function(el) {
       return el.tagName == 'A';
     });
     // Use getAttribute() to prevent URL normalization.
     if (anchor && anchor.getAttribute('href') == '#')
       e.preventDefault();
   });
 }