Rename fetch layout tests.

LayoutTests/http/tests/fetch/resources/init.js

 if (window.testRunner) {
   // In Chromium we need to change the setting to disallow displaying
   // insecure contents.
 
   // By default, LayoutTest content_shell returns allowed for
   // "Should fetching request be blocked as mixed content?" at Step 5:
   // https://w3c.github.io/webappsec/specs/mixedcontent/#should-block-fetch
   // > If the user agent has been instructed to allow mixed content
   // Turning the switch below to false makes this condition above false, and
   // make content_shell to run into Step 7 to test mixed content blocking.
   testRunner.overridePreference('WebKitAllowRunningInsecureContent', false);
   //FIXME: to be removed.
   //testRunner.overridePreference('WebKitAllowDisplayingInsecureContent', true);
 
   // Accept all cookies.
   testRunner.setAlwaysAcceptCookies(true);
 }
 
 // How tests starts:
 // 1. http://127.0.0.1:8000/.../X.html is loaded.
 // 2. init(): Do initialization.
-//    In fetch-access-control* tests
-//    (see init() in fetch-access-control-util.js):
+//    In thorough/* tests
+//    (see init() in thorough-util.js):
 //    - Login to HTTP pages.
 //      This is done first from HTTP origin to avoid mixed content blocking.
 //    - Login to HTTPS pages.
 // If the test is not base-https:
 //   3a. start(): Start tests.
 // Otherwise:
 //   3b. Redirect to https://127.0.0.1:8443/.../X.html.
 //   4b. start(): Start tests.
 
 var t = async_test('Startup');
 if (location.protocol != 'https:') {
   init(t)
     .then(function() {
-        // Initialization done. In fetch-access-control* tests, login done.
+        // Initialization done. In thorough/* tests, login done.
         if (location.pathname.indexOf('base-https') >= 0) {
           // Step 3b. For base-https tests, redirect to HTTPS page here.
           location = 'https://127.0.0.1:8443' + location.pathname;
         } else {
           // Step 3a. For non-base-https tests, start tests here.
           start(t);
         }
       });
 } else {
   // Step 4b. Already redirected to the HTTPS page.
   // Start tests for base-https tests here.
   start(t);
 }