Tried to add keyboard shortcuts to trigger switch access commands. Maybe missing a permission.

chrome/browser/resources/chromeos/switch_access/switch_access.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.
 
 console.log("Switch access is enabled");
+
+console.log(chrome);
+console.log(chrome.commands);
+console.log(chrome.commands.onCommand);
+console.log(chrome.commands.onCommand.addListener);
+
+chrome.commands.onCommand.addListener(function(command) {
+  console.log("Start of onCommand listener");
+  console.log("Triggered command: ", command);
+  console.log("End of onCommand listener");
+});
+
+chrome.commands.getAll(function(commands) {
+  console.log(commands);
+});
+
+console.log("Reached end of code");