Revert: electron/electron#14487 (#19011)

lib/browser/guest-view-manager.js

@@ -66,19 +66,6 @@ const createGuest = function (embedder, params) {
   }
 
   // Clear the guest from map when it is destroyed.
-  //
-  // The guest WebContents is usually destroyed in 2 cases:
-  // 1. The embedder frame is closed (reloaded or destroyed), and it
-  //    automatically closes the guest frame.
-  // 2. The guest frame is detached dynamically via JS, and it is manually
-  //    destroyed when the renderer sends the GUEST_VIEW_MANAGER_DESTROY_GUEST
-  //    message.
-  // The second case relies on the libcc patch:
-  //   https://github.com/electron/libchromiumcontent/pull/676
-  // The patch was introduced to work around a bug in Chromium:
-  //   https://github.com/electron/electron/issues/14211
-  // We should revisit the bug to see if we can remove our libcc patch, the
-  // patch was introduced in Chrome 66.
   guest.once('destroyed', () => {
     if (guestInstanceId in guestInstances) {
       detachGuest(embedder, guestInstanceId)
@@ -340,15 +327,6 @@ handleMessage('ELECTRON_GUEST_VIEW_MANAGER_CREATE_GUEST', function (event, param
   return createGuest(event.sender, params)
 })
 
-handleMessage('ELECTRON_GUEST_VIEW_MANAGER_DESTROY_GUEST', function (event, guestInstanceId) {
-  try {
-    const guest = getGuestForWebContents(guestInstanceId, event.sender)
-    guest.detachFromOuterFrame()
-  } catch (error) {
-    console.error(`Guest destroy failed: ${error}`)
-  }
-})
-
 handleMessage('ELECTRON_GUEST_VIEW_MANAGER_ATTACH_GUEST', function (event, embedderFrameId, elementInstanceId, guestInstanceId, params) {
   try {
     attachGuest(event, embedderFrameId, elementInstanceId, guestInstanceId, params)

lib/renderer/web-view/guest-view-internal.ts

@@ -100,10 +100,6 @@ export function createGuestSync (params: Record<string, any>): number {
   return invokeSync('ELECTRON_GUEST_VIEW_MANAGER_CREATE_GUEST', params)
 }
 
-export function destroyGuest (guestInstanceId: number): void {
-  invoke('ELECTRON_GUEST_VIEW_MANAGER_DESTROY_GUEST', guestInstanceId)
-}
-
 export function attachGuest (
   elementInstanceId: number, guestInstanceId: number, params: Record<string, any>, contentWindow: Window
 ) {
@@ -118,6 +114,5 @@ export const guestViewInternalModule = {
   deregisterEvents,
   createGuest,
   createGuestSync,
-  destroyGuest,
   attachGuest
 }

lib/renderer/web-view/web-view-impl.ts

@@ -69,7 +69,6 @@ export class WebViewImpl {
     // heard back from createGuest yet. We will not reset the flag in this case so
     // that we don't end up allocating a second guest.
     if (this.guestInstanceId) {
-      guestViewInternal.destroyGuest(this.guestInstanceId)
       this.guestInstanceId = void 0
     }