DevTools: Fix the inspector/extensions/extensions-audits.html.

LayoutTests/inspector/extensions/extensions-audits-tests.js

 function extension_runAudits(callback)
 {
     evaluateOnFrontend("InspectorTest.startExtensionAudits(reply);", callback);
 }
 
 // runs in front-end
 var initialize_ExtensionsAuditsTest = function()
 {
     InspectorTest.startExtensionAudits = function(callback)
     {
         const launcherView = WebInspector.panels.audits._launcherView;
         launcherView._selectAllClicked(false);
         launcherView._auditPresentStateElement.checked = true;
 
-        var extensionCategories = document.evaluate("label[starts-with(.,'Extension ')]/input[@type='checkbox']",
-            WebInspector.panels.audits._launcherView._categoriesElement, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
-
-        for (var i = 0; i < extensionCategories.snapshotLength; ++i)
-            extensionCategories.snapshotItem(i).click();
+        var extensionCategories = document.querySelectorAll(".audit-categories-container > label");
+        for (var i = 0; i < extensionCategories.length; ++i) {
+            var shouldBeEnabled = extensionCategories[i].textContent.includes("Extension");
+            if (shouldBeEnabled !== extensionCategories[i].checkboxElement.checked)
+                extensionCategories[i].checkboxElement.click();
+        }
 
         function onAuditsDone()
         {
             InspectorTest.collectAuditResults(callback);
         }
         InspectorTest.addSniffer(WebInspector.panels.audits, "auditFinishedCallback", onAuditsDone, true);
 
         launcherView._launchButtonClicked();
     }
 
     InspectorTest.dumpAuditProgress = function()
     {
         var progress = document.querySelector(".progress-indicator").shadowRoot.querySelector("progress");
         InspectorTest.addResult("Progress: " + Math.round(100 * progress.value / progress.max) + "%");
     }
 
     // We will render DOM node results, so preload elements.
     InspectorTest.preloadPanel("elements");
     InspectorTest.preloadPanel("audits");
 }