Change GuestViewInternalCreateGuestFunction to create the guest view using the

chrome/browser/extensions/api/guest_view/guest_view_internal_api.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 "chrome/browser/extensions/api/guest_view/guest_view_internal_api.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/guest_view_internal.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 15 matching lines @@
 
   base::DictionaryValue* create_params;
   EXTENSION_FUNCTION_VALIDATE(args_->GetDictionary(1, &create_params));
 
   GuestViewManager* guest_view_manager =
       GuestViewManager::FromBrowserContext(browser_context());
 
   GuestViewManager::WebContentsCreatedCallback callback =
       base::Bind(&GuestViewInternalCreateGuestFunction::CreateGuestCallback,
                  this);
+
+  content::WebContents* embedder_web_contents =
+      content::WebContents::FromRenderViewHost(render_view_host());
+  if (!embedder_web_contents) {
+    error_ = "Guest views can only be embedded in web content";
+    return false;
+  }
+
   guest_view_manager->CreateGuest(view_type,
                                   extension_id(),
-                                  GetAssociatedWebContents(),
+                                  embedder_web_contents,
                                   *create_params,
                                   callback);
-
   return true;
 }
 
 void GuestViewInternalCreateGuestFunction::CreateGuestCallback(
     content::WebContents* guest_web_contents) {
   int guest_instance_id = 0;
   if (guest_web_contents) {
     GuestViewBase* guest = GuestViewBase::FromWebContents(guest_web_contents);
     guest_instance_id = guest->GetGuestInstanceID();
   }
@@ skipping 20 matching lines @@
   guest->SetAutoSize(params->params.enable_auto_size,
                      gfx::Size(params->params.min.width,
                                params->params.min.height),
                      gfx::Size(params->params.max.width,
                                params->params.max.height));
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions