DevTools: Show Chrome app's background page in chrome://inspect#extension

chrome/browser/resources/inspect/inspect.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.
 
 var MIN_VERSION_TAB_CLOSE = 25;
 var MIN_VERSION_TARGET_ID = 26;
 var MIN_VERSION_NEW_TAB = 29;
 var MIN_VERSION_TAB_ACTIVATE = 30;
 
 function sendCommand(command, args) {
@@ skipping 309 matching lines @@
 }
 
 function addToPagesList(data) {
   var row = addTargetToList(data, $('pages-list'), ['name', 'url']);
   addFavicon(row, data);
 }
 
 function addToExtensionsList(data) {
   var row = addTargetToList(data, $('extensions-list'), ['name', 'url']);
   addFavicon(row, data);
+  if (data.guests)
+    addGuestViews(row, data.guests);
 }
 
 function addToAppsList(data) {
   var row = addTargetToList(data, $('apps-list'), ['name', 'url']);
   addFavicon(row, data);
-  if (data.guests) {
-    Array.prototype.forEach.call(data.guests, function(guest) {
-      var guestRow = addTargetToList(guest, row, ['name', 'url']);
-      guestRow.classList.add('guest');
-      addFavicon(guestRow, guest);
-    });
-  }
+  if (data.guests)
+    addGuestViews(row, data.guests);
+}
+
+function addGuestViews(row, guests) {
+  Array.prototype.forEach.call(guests, function(guest) {
+    var guestRow = addTargetToList(guest, row, ['name', 'url']);
+    guestRow.classList.add('guest');
+    addFavicon(guestRow, guest);
+  });
 }
 
 function addToWorkersList(data) {
   var row =
       addTargetToList(data, $('workers-list'), ['name', 'description', 'url']);
   addActionLink(row, 'terminate',
       sendTargetCommand.bind(null, 'close', data), data.attached);
 }
 
 function addToOthersList(data) {
@@ skipping 444 matching lines @@
   line.classList.remove('fresh');
   var freshLine = createEmptyConfigLine();
   line.parentNode.appendChild(freshLine);
   if (opt_selectNew)
     freshLine.querySelector('.port').focus();
 }
 
 document.addEventListener('DOMContentLoaded', onload);
 
 window.addEventListener('hashchange', onHashChange);