Revert of [Presentation API] Allow PresentationConnection state change to "Connecting"

third_party/WebKit/LayoutTests/presentation/resources/presentation-service-mock.js

 /*
  * Mock implementation of mojo PresentationService.
  */
 
 "use strict";
 
-const presentationServiceMock =
-    loadMojoModules('presentationServiceMock', [
+let presentationServiceMock = loadMojoModules(
+    'presentationServiceMock',
+    [
       'third_party/WebKit/public/platform/modules/presentation/presentation.mojom',
       'mojo/public/js/bindings',
     ]).then(mojo => {
-      const [presentationService, bindings] = mojo.modules;
+      let [ presentationService, bindings ] = mojo.modules;
 
       class PresentationServiceMock {
         constructor(interfaceProvider) {
           interfaceProvider.addInterfaceOverrideForTesting(
               presentationService.PresentationService.name,
               handle => this.bindingSet_.addBinding(this, handle));
           this.interfaceProvider_ = interfaceProvider;
           this.pendingResponse_ = null;
           this.bindingSet_ = new bindings.BindingSet(
               presentationService.PresentationService);
         }
 
-        setClient(client) { this.client_ = client; }
-
         startSession(urls) {
           return Promise.resolve({
               sessionInfo: { url: urls[0], id: 'fakesession' },
               error: null,
           });
         }
 
         joinSession(urls) {
           return Promise.resolve({
               sessionInfo: { url: urls[0], id: 'fakeSessionId' },
               error: null,
           });
         }
-
-        closeConnection(url, id) {
-          this.client_.onConnectionClosed(
-              {url: url, id: id},
-              presentationService.PresentationConnectionCloseReason.CLOSED, '');
-        }
       }
 
       return new PresentationServiceMock(mojo.frameInterfaces);
     });
 
 function waitForClick(callback, button) {
   button.addEventListener('click', callback, { once: true });
 
   if (!('eventSender' in window))
     return;
 
-  const boundingRect = button.getBoundingClientRect();
-  const x = boundingRect.left + boundingRect.width / 2;
-  const y = boundingRect.top + boundingRect.height / 2;
+  var boundingRect = button.getBoundingClientRect();
+  var x = boundingRect.left + boundingRect.width / 2;
+  var y = boundingRect.top + boundingRect.height / 2;
 
   eventSender.mouseMoveTo(x, y);
   eventSender.mouseDown();
   eventSender.mouseUp();
 }