Propagate opener to BackgroundsContents.

chrome/browser/prerender/prerender_contents.cc

 // Copyright (c) 2012 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/prerender/prerender_contents.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <functional>
@@ skipping 122 matching lines @@
   void CanDownload(const GURL& url,
                    const std::string& request_method,
                    const base::Callback<void(bool)>& callback) override {
     prerender_contents_->Destroy(FINAL_STATUS_DOWNLOAD);
     // Cancel the download.
     callback.Run(false);
   }
 
   bool 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,
       SessionStorageNamespace* session_storage_namespace) override {
@@ skipping 636 matching lines @@
   idle_resources_.push_back(throttle);
 }
 
 void PrerenderContents::AddNetworkBytes(int64_t bytes) {
   network_bytes_ += bytes;
   for (Observer& observer : observer_list_)
     observer.OnPrerenderNetworkBytesChanged(this);
 }
 
 }  // namespace prerender