Remove guest from will-attach-webview event

docs/api/web-contents.md

@@ -507,7 +507,6 @@ Emitted when the devtools window instructs the webContents to reload
 Returns:
 
 * `event` Event
-* `guest` WebContents - The contents of the guest page.
 * `webPreferences` Object - The web preferences that will be used by the guest
   page. This object can be modified to adjust the preferences for the guest
   page.

lib/browser/guest-view-manager.js

@@ -206,7 +206,7 @@ const attachGuest = function (event, elementInstanceId, guestInstanceId, params)
     webPreferences.preloadURL = params.preload
   }
 
-  event.sender.emit('will-attach-webview', event, guest, webPreferences, params)
+  event.sender.emit('will-attach-webview', event, webPreferences, params)
   if (event.defaultPrevented) {
     if (guest.viewInstanceId == null) guest.viewInstanceId = params.instanceId
     destroyGuest(embedder, guestInstanceId)

spec/static/main.js

@@ -255,7 +255,7 @@ ipcMain.on('prevent-next-will-attach-webview', (event) => {
 })
 
 ipcMain.on('disable-node-on-next-will-attach-webview', (event, id) => {
-  event.sender.once('will-attach-webview', (event, guest, webPreferences, params) => {
+  event.sender.once('will-attach-webview', (event, webPreferences, params) => {
     params.src = `file://${path.join(__dirname, '..', 'fixtures', 'pages', 'c.html')}`
     webPreferences.nodeIntegration = false
   })

spec/webview-spec.js

@@ -1100,7 +1100,7 @@ describe('<webview> tag', function () {
     w.loadURL('file://' + fixtures + '/pages/webview-visibilitychange.html')
   })
 
-  describe('will-attach-webview event', () => {
+  describe.only('will-attach-webview event', () => {
     it('supports changing the web preferences', (done) => {
       ipcRenderer.send('disable-node-on-next-will-attach-webview')
       webview.addEventListener('console-message', (event) => {