Set render_frame_id while fetching from the dedicated worker for off-main-thread-fetch

content/test/data/workers/worker_common.js

 // Copyright 2015 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.
 
 // Track the number of clients for this worker - tests can use this to ensure
 // that shared workers are actually shared, not distinct.
 var num_clients = 0;
 
 if (!self.postMessage) {
   // This is a shared worker - mimic dedicated worker APIs
   onconnect = function(event) {
     num_clients++;
     event.ports[0].onmessage = function(e) {
       self.postMessage = function(msg) {
         event.ports[0].postMessage(msg);
       };
       self.onmessage(e);
     };
   };
 } else {
   num_clients++;
 }
 onmessage = function(evt) {
-  if (evt.data == "ping")
+  if (evt.data == "ping") {
     postMessage("pong");
-  else if (evt.data == "auth")
+  } else if (evt.data == "auth") {
     importScripts("/auth-basic");
-  else if (evt.data == "close")
+  } else if (evt.data == "close") {
     close();
-  else if (/eval.+/.test(evt.data)) {
+  } else if (/eval.+/.test(evt.data)) {
     try {
       postMessage(eval(evt.data.substr(5)));
     } catch (ex) {
       postMessage(ex);
     }
-  } else if (/tls-client-auth.+/.test(evt.data)) {
+  } else if (/tls-client-auth-import.+/.test(evt.data)) {
     try {
-      importScripts(evt.data.substr(16));
+      importScripts(evt.data.substr(23));
     } catch (ex) {
     }
     postMessage("done");
+  } else if (/tls-client-auth-fetch.+/.test(evt.data)) {
+    fetch(evt.data.substr(22)).then(_ => {}, _ => postMessage("done"));
   }
 }