Added last_access_time to DownloadItem and History DB

content/public/browser/download_manager.h

Index: content/public/browser/download_manager.h
diff --git a/content/public/browser/download_manager.h b/content/public/browser/download_manager.h
index 7a72e1b67eb1587d181a869b0abe721d570614a6..477963e445fdf10ae58d04f935d3c1482bdfc1e5 100644
--- a/content/public/browser/download_manager.h
+++ b/content/public/browser/download_manager.h
@@ -140,8 +140,8 @@ class CONTENT_EXPORT DownloadManager : public base::SupportsUserData::Data {
       const GURL& tab_referrer_url,
       const std::string& mime_type,
       const std::string& original_mime_type,
-      const base::Time& start_time,
-      const base::Time& end_time,
+      base::Time start_time,
+      base::Time end_time,
       const std::string& etag,
       const std::string& last_modified,
       int64_t received_bytes,
@@ -151,6 +151,7 @@ class CONTENT_EXPORT DownloadManager : public base::SupportsUserData::Data {
       DownloadDangerType danger_type,
       DownloadInterruptReason interrupt_reason,
       bool opened,
+      base::Time last_access_time,
       const std::vector<DownloadItem::ReceivedSlice>& received_slices) = 0;
 
   // The number of in progress (including paused) downloads.