DevTools: introduce a stub for the new audits panel (behind experiment).

third_party/WebKit/Source/devtools/front_end/worker_service/ServiceDispatcher.js

 // Copyright 2016 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.
 
 /**
  * @interface
  */
 function Service() { }
 
 Service.prototype = {
@@ skipping 122 matching lines @@
      */
     _sendErrorResponse: function(messageId, error)
     {
         var message = { id: messageId, error: error };
         this._port.send(JSON.stringify(message));
     }
 }
 
 /**
  * @constructor
- * @param {!Port} port
+ * @param {!Port|!Worker} port
  * @implements {ServicePort}
  */
 function WorkerServicePort(port)
 {
     this._port = port;
     this._port.onmessage = this._onMessage.bind(this);
     this._port.onerror = console.error;
 }
 
 WorkerServicePort.prototype = {
@@ skipping 39 matching lines @@
 
 var dispatchers = [];
 var portInitialized = false;
 /** @type {!Map<string, function(new:Service)>}*/
 var services = new Map();
 
 /**
  * @param {string} serviceName
  * @param {function(new:Service)} constructor
  */
+function initializeWorkerService(serviceName, constructor)
+{
+    services.set(serviceName, constructor);
+    if (!dispatchers.length) {
+        var worker = /** @type {!Object} */(self);

[dgozman, 2016/10/14 03:14:58]

@type {!Worker}

[pfeldman, 2016/10/14 17:29:20]

JSCompiler won't let you do that...

+        var servicePort = new WorkerServicePort(/** @type {!Worker} */(worker));
+        var dispatcher = new ServiceDispatcher(servicePort);
+        dispatchers.push(dispatcher);
+    }
+    dispatchers[0].registerObject(serviceName, constructor);
+}
+
+/**
+ * @param {string} serviceName
+ * @param {function(new:Service)} constructor
+ */
 function initializeSharedWorkerService(serviceName, constructor)
 {
     services.set(serviceName, constructor);
 
     if (!portInitialized) {
         portInitialized = true;
         Runtime.setSharedWorkerNewPortCallback(onNewPort);
     } else {
         for (var dispatcher of dispatchers)
             dispatcher.registerObject(serviceName, constructor);
     }
 
     function onNewPort(port)
     {
         var servicePort = new WorkerServicePort(port);
         var dispatcher = new ServiceDispatcher(servicePort);
         dispatchers.push(dispatcher);
         for (var name of services.keys())
             dispatcher.registerObject(name, services.get(name));
     }
 }