Bug 1523494 - Increase sw timeout in serviceworker_timeout.js mochite…

…st r=daisuke

This mochitest had a very short SW timeout of 1 second, sometimes the worker would already be terminated before we could finish to attach a toolbox.
Increase the timeout to 4 seconds.

Differential Revision: https://phabricator.services.mozilla.com/D29154

--HG--
extra : moz-landing-system : lando

devtools/client/aboutdebugging-new/test/browser/browser_aboutdebugging_serviceworker_timeout.js

@@ -5,14 +5,14 @@
 
 // This test will be idle for a long period to give a chance to the service worker to
 // timeout.
-requestLongerTimeout(2);
+requestLongerTimeout(3);
 
 /* import-globals-from helper-serviceworker.js */
 Services.scriptloader.loadSubScript(CHROME_URL_ROOT + "helper-serviceworker.js", this);
 
 const SW_TAB_URL = URL_ROOT + "resources/service-workers/empty-sw.html";
 const SW_URL = URL_ROOT + "resources/service-workers/empty-sw.js";
-const SW_TIMEOUT = 1000;
+const SW_TIMEOUT = 4000;
 
 // This is a migration from:
 // https://searchfox.org/mozilla-central/source/devtools/client/aboutdebugging/test/browser_service_workers_timeout.js
@@ -59,11 +59,11 @@ add_task(async function() {
   inspectButton.click();
   await onToolboxReady;
 
-  // Wait for more 10 times the service worker timeout to check that the toolbox prevents
+  // Wait for more 5 times the service worker timeout to check that the toolbox prevents
   // the worker from being destroyed.
-  await wait(SW_TIMEOUT * 10);
+  await wait(SW_TIMEOUT * 5);
 
-  // Check that the service worker is still running, even after waiting 10 times the
+  // Check that the service worker is still running, even after waiting 5 times the
   // service worker timeout.
   const hasInspectButton = !!getInspectButton(SW_URL, document);
   ok(hasInspectButton, "Service worker target still has an inspect button");