Have a list of pending checks instead of pending clients

chrome/browser/loader/safe_browsing_resource_throttle.h

 // 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.
 
 #ifndef CHROME_BROWSER_LOADER_SAFE_BROWSING_RESOURCE_THROTTLE_H_
 #define CHROME_BROWSER_LOADER_SAFE_BROWSING_RESOURCE_THROTTLE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 150 matching lines @@
   base::OneShotTimer timer_;
 
   // The redirect chain for this resource
   std::vector<GURL> redirect_urls_;
 
   // If in DEFERRED_UNCHECKED_REDIRECT state, this is the
   // URL we still need to check before resuming.
   GURL unchecked_redirect_url_;
   GURL url_being_checked_;
 
+  // TODO(vakh): The following vector should be removed after fixing
+  // http://crbug.com/660293
+  // URLs that timed out waiting for a SafeBrowsing reputation check.
+  std::vector<GURL> timed_out_urls_;
+
   scoped_refptr<safe_browsing::SafeBrowsingDatabaseManager> database_manager_;
   scoped_refptr<safe_browsing::SafeBrowsingUIManager> ui_manager_;
   const net::URLRequest* request_;
   const content::ResourceType resource_type_;
   net::NetLogWithSource net_log_with_source_;
 
   DISALLOW_COPY_AND_ASSIGN(SafeBrowsingResourceThrottle);
 };
 
 #endif  // CHROME_BROWSER_LOADER_SAFE_BROWSING_RESOURCE_THROTTLE_H_