Persist download interrupt reason, both target and current paths, and url_chain.

chrome/browser/history/download_database.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_HISTORY_DOWNLOAD_DATABASE_H_
 #define CHROME_BROWSER_HISTORY_DOWNLOAD_DATABASE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 24 matching lines @@
 
   // Get all the downloads from the database.
   void QueryDownloads(
       std::vector<content::DownloadPersistentStoreInfo>* results);
 
   // Update the state of one download. Returns true if successful.
   // Does not update |url|, |start_time|, |total_bytes|; uses |db_handle| only
   // to select the row in the database table to update.
   bool UpdateDownload(const content::DownloadPersistentStoreInfo& data);
 
-  // Update the path of one download. Returns true if successful.
-  bool UpdateDownloadPath(const FilePath& path, DownloadID db_handle);
+  // Update the paths of one download. Returns true if successful.
+  bool UpdateDownloadPath(const FilePath& target_path,
+                          const FilePath& current_path,
+                          DownloadID db_handle);
 
   // Fixes state of the download entries. Sometimes entries with IN_PROGRESS
   // state are not updated during browser shutdown (particularly when crashing).
   // On the next start such entries are considered canceled. This functions
   // fixes such entries.
   bool CleanUpInProgressEntries();
 
   // Create a new database entry for one download and return its primary db id.
   int64 CreateDownload(const content::DownloadPersistentStoreInfo& info);
 
@@ skipping 11 matching lines @@
   virtual sql::Connection& GetDB() = 0;
 
   // Returns the meta-table object for the functions in this interface.
   virtual sql::MetaTable& GetMetaTable() = 0;
 
   // Returns true if able to successfully rewrite the invalid values for the
   // |state| field from 3 to 4. Returns false if there was an error fixing the
   // database. See http://crbug.com/140687
   bool MigrateDownloadsState();
 
+  // Returns true if able to successful add the last interrupt reason and the
+  // two target paths to downloads.
+  bool MigrateReasonAndPaths();
+
   // Creates the downloads table if needed.
   bool InitDownloadTable();
 
   // Used to quickly clear the downloads. First you would drop it, then you
   // would re-initialize it.
   bool DropDownloadTable();
 
  private:
   // TODO(rdsmith): Remove after http://crbug.com/96627 has been resolved.
   void CheckThread();
 
   bool EnsureColumnExists(const std::string& name, const std::string& type);
 
   bool owning_thread_set_;
   base::PlatformThreadId owning_thread_;
 
   int next_id_;
   int next_db_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadDatabase);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_DOWNLOAD_DATABASE_H_