Expose final download URL (actual url after redirects) in the extension API.

chrome/browser/download/download_query.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_DOWNLOAD_DOWNLOAD_QUERY_H_
 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_QUERY_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 51 matching lines @@
     FILTER_FILENAME_REGEX,       // string
     FILTER_MIME,                 // string
     FILTER_PAUSED,               // bool
     FILTER_QUERY,                // vector<base::string16>
     FILTER_STARTED_AFTER,        // string
     FILTER_STARTED_BEFORE,       // string
     FILTER_START_TIME,           // string
     FILTER_TOTAL_BYTES,          // double
     FILTER_TOTAL_BYTES_GREATER,  // double
     FILTER_TOTAL_BYTES_LESS,     // double
+    FILTER_ORIGINAL_URL,         // string
+    FILTER_ORIGINAL_URL_REGEX,   // string
     FILTER_URL,                  // string
     FILTER_URL_REGEX,            // string
   };
 
   enum SortType {
     SORT_BYTES_RECEIVED,
     SORT_DANGER,
     SORT_DANGER_ACCEPTED,
     SORT_END_TIME,
     SORT_EXISTS,
     SORT_FILENAME,
     SORT_MIME,
     SORT_PAUSED,
     SORT_START_TIME,
     SORT_STATE,
     SORT_TOTAL_BYTES,
+    SORT_ORIGINAL_URL,
     SORT_URL,
   };
 
   enum SortDirection {
     ASCENDING,
     DESCENDING,
   };
 
   static bool MatchesQuery(const std::vector<base::string16>& query_terms,
                            const content::DownloadItem& item);
@@ skipping 54 matching lines @@
   void FinishSearch(DownloadVector* results) const;
 
   FilterCallbackVector filters_;
   SorterVector sorters_;
   size_t limit_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadQuery);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_QUERY_H_