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 207 matching lines @@
   GuestViewManager::FromBrowserContext(browser_context_)->
       AddGuest(guest_instance_id_, guest_web_contents);
 
   // Create a ZoomController to allow the guest's contents to be zoomed.
   ui_zoom::ZoomController::CreateForWebContents(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())

[Fady Samuel, 2015/03/04 20:44:47]

This makes me sad.

+  //  SetUpSizing(create_params);
 
   // Give the derived class an opportunity to perform additional initialization.
   DidInitialize(create_params);
 }
 
 void GuestViewBase::DispatchOnResizeEvent(const gfx::Size& old_size,
                                           const gfx::Size& new_size) {
   if (new_size == old_size)
     return;
 
@@ skipping 571 matching lines @@
 void GuestViewBase::RegisterGuestViewTypes() {
   AppViewGuest::Register();
   ExtensionOptionsGuest::Register();
   ExtensionViewGuest::Register();
   MimeHandlerViewGuest::Register();
   SurfaceWorkerGuest::Register();
   WebViewGuest::Register();
 }
 
 }  // namespace extensions