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

content/browser/download/download_manager_impl.h

Index: content/browser/download/download_manager_impl.h
diff --git a/content/browser/download/download_manager_impl.h b/content/browser/download/download_manager_impl.h
index 0e6d6ba1d0ca1b9d44c65e9bd86a934e02d6b2af..69592f712a4e17ed7fec3d0848f0d85df6d1299f 100644
--- a/content/browser/download/download_manager_impl.h
+++ b/content/browser/download/download_manager_impl.h
@@ -64,14 +64,16 @@ class CONTENT_EXPORT DownloadManagerImpl : public DownloadManager,
   virtual void AddObserver(Observer* observer) OVERRIDE;
   virtual void RemoveObserver(Observer* observer) OVERRIDE;
   virtual content::DownloadItem* CreateDownloadItem(
-      const FilePath& path,
-      const GURL& url,
+      const FilePath& current_path,
+      const FilePath& target_path,
+      const std::vector<GURL>& url_chain,
       const GURL& referrer_url,
       const base::Time& start_time,
       const base::Time& end_time,
       int64 received_bytes,
       int64 total_bytes,
       content::DownloadItem::DownloadState state,
+      DownloadInterruptReason interrupt_reason,
       bool opened) OVERRIDE;
   virtual int InProgressCount() const OVERRIDE;
   virtual BrowserContext* GetBrowserContext() const OVERRIDE;
@@ -98,8 +100,9 @@ class CONTENT_EXPORT DownloadManagerImpl : public DownloadManager,
 
   virtual ~DownloadManagerImpl();
 
-  // Creates the download item.  Must be called on the UI thread.
-  virtual DownloadItemImpl* CreateDownloadItem(
+  // Creates the download item based on a DownloadCreateInfo from the IO
+  // thread.  Must be called on the UI thread.
+  virtual DownloadItemImpl* CreateDownloadItemInternal(
       DownloadCreateInfo* info, const net::BoundNetLog& bound_net_log);
 
   // Get next download id.