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

chrome/browser/history/download_database.h

Index: chrome/browser/history/download_database.h
diff --git a/chrome/browser/history/download_database.h b/chrome/browser/history/download_database.h
index 929b097a6332ca7cef70c4e0b3bbeeb9ee129697..d8ceda9c3e014dcae6eae2969c2c9f44cea99cd1 100644
--- a/chrome/browser/history/download_database.h
+++ b/chrome/browser/history/download_database.h
@@ -67,6 +67,10 @@ class DownloadDatabase {
   // database. See http://crbug.com/140687
   bool MigrateDownloadsState();
 
+  // Returns true if able to successfully add the last interrupt reason and the
+  // two target paths to downloads.
+  bool MigrateDownloadsReasonPathsAndDangerType();
+
   // Creates the downloads table if needed.
   bool InitDownloadTable();