Make <webview> use out-of-process iframe architecture.

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/page_zoom.h"
 #include "components/ui/zoom/zoom_controller.h"
@@ skipping 200 matching lines @@
   guest_web_contents->SetDelegate(this);
   webcontents_guestview_map.Get().insert(
       std::make_pair(guest_web_contents, this));
   GuestViewManager::FromBrowserContext(browser_context_)->
       AddGuest(guest_instance_id_, guest_web_contents);
 
   // Populate the view instance ID if we have it on creation.
   create_params.GetInteger(guestview::kParameterInstanceId,
                            &view_instance_id_);
 
-  if (CanRunInDetachedState())
-    SetUpSizing(create_params);
+  // if (CanRunInDetachedState())
+  //  SetUpSizing(create_params);
 
   // Observe guest zoom changes.
   auto zoom_controller =
       ui_zoom::ZoomController::FromWebContents(web_contents());
   zoom_controller->AddObserver(this);
 
   // Give the derived class an opportunity to perform additional initialization.
   DidInitialize(create_params);
 }
 
@@ skipping 141 matching lines @@
 content::WebContents* GuestViewBase::CreateNewGuestWindow(
     const content::WebContents::CreateParams& create_params) {
   auto guest_manager = GuestViewManager::FromBrowserContext(browser_context());
   return guest_manager->CreateGuestWithWebContentsParams(
       GetViewType(),
       owner_web_contents(),
       create_params);
 }
 
 void GuestViewBase::DidAttach(int guest_proxy_routing_id) {
-  DCHECK(guest_proxy_routing_id_ == MSG_ROUTING_NONE ||
-         guest_proxy_routing_id == guest_proxy_routing_id_);
+  // DCHECK(guest_proxy_routing_id_ == MSG_ROUTING_NONE ||
+  //       guest_proxy_routing_id == guest_proxy_routing_id_);
   guest_proxy_routing_id_ = guest_proxy_routing_id;
 
   opener_lifetime_observer_.reset();
 
   SetUpSizing(*attach_params());
 
   // Give the derived class an opportunity to perform some actions.
   DidAttachToEmbedder();
 
   // Inform the associated GuestViewContainer that the contentWindow is ready.
@@ skipping 419 matching lines @@
 
   auto embedder_zoom_controller =
       ui_zoom::ZoomController::FromWebContents(owner_web_contents());
   // Chrome Apps do not have a ZoomController.
   if (!embedder_zoom_controller)
     return;
   embedder_zoom_controller->RemoveObserver(this);
 }
 
 }  // namespace extensions