Propagate opener to BackgroundsContents.

components/offline_pages/content/background_loader/background_loader_contents.cc

 // Copyright (c) 2016 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 "components/offline_pages/content/background_loader/background_loader_contents.h"
 
 #include "content/public/browser/web_contents.h"
 
 namespace background_loader {
 
@@ skipping 45 matching lines @@
 void BackgroundLoaderContents::CanDownload(
     const GURL& url,
     const std::string& request_method,
     const base::Callback<void(bool)>& callback) {
   // Do not download anything.
   callback.Run(false);
 }
 
 bool BackgroundLoaderContents::ShouldCreateWebContents(
     content::WebContents* web_contents,
+    content::RenderFrameHost* opener,
     content::SiteInstance* source_site_instance,
     int32_t route_id,
     int32_t main_frame_route_id,
     int32_t main_frame_widget_route_id,
     content::mojom::WindowContainerType window_container_type,
     const GURL& opener_url,
     const std::string& frame_name,
     const GURL& target_url,
     const std::string& partition_id,
     content::SessionStorageNamespace* session_storage_namespace) {
@@ skipping 38 matching lines @@
     content::MediaStreamType type) {
   return false;  // No permissions granted.
 }
 
 BackgroundLoaderContents::BackgroundLoaderContents()
     : browser_context_(nullptr) {
   web_contents_.reset();
 }
 
 }  // namespace background_loader