Fix message routing for BrowserPlugin in iframe

extensions/browser/guest_view/guest_view_base.cc

 // Copyright 2014 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.
 
 #include "extensions/browser/guest_view/guest_view_base.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/ui/zoom/zoom_controller.h"
 #include "content/public/browser/navigation_details.h"
@@ skipping 304 matching lines @@
 }
 
 void GuestViewBase::DidAttach(int guest_proxy_routing_id) {
   opener_lifetime_observer_.reset();
 
   // Give the derived class an opportunity to perform some actions.
   DidAttachToEmbedder();
 
   // Inform the associated GuestViewContainer that the contentWindow is ready.
   embedder_web_contents()->Send(new ExtensionMsg_GuestAttached(
-      embedder_web_contents()->GetMainFrame()->GetRoutingID(),
       element_instance_id_,
       guest_proxy_routing_id));
 
   SendQueuedEvents();
 }
 
 void GuestViewBase::DidDetach() {
   GuestViewManager::FromBrowserContext(browser_context_)->DetachGuest(
       this, element_instance_id_);
   StopTrackingEmbedderZoomLevel();
   owner_web_contents()->Send(new ExtensionMsg_GuestDetached(
-      owner_web_contents()->GetMainFrame()->GetRoutingID(),
       element_instance_id_));
   element_instance_id_ = guestview::kInstanceIDNone;
 }
 
 void GuestViewBase::ElementSizeChanged(const gfx::Size& old_size,
                                        const gfx::Size& new_size) {
   element_size_ = new_size;
 }
 
 WebContents* GuestViewBase::GetOwnerWebContents() const {
@@ skipping 241 matching lines @@
 // static
 void GuestViewBase::RegisterGuestViewTypes() {
   AppViewGuest::Register();
   ExtensionOptionsGuest::Register();
   MimeHandlerViewGuest::Register();
   WebViewGuest::Register();
   WorkerFrameGuest::Register();
 }
 
 }  // namespace extensions