Make DownloadHistory observe manager, items

net/base/net_log_event_type_list.h

Index: net/base/net_log_event_type_list.h
diff --git a/net/base/net_log_event_type_list.h b/net/base/net_log_event_type_list.h
index 8fea0d50479946c4e4907c3f838a528d74832925..206e905a5931c41ecce526b4843412dcb1ade489 100644
--- a/net/base/net_log_event_type_list.h
+++ b/net/base/net_log_event_type_list.h
@@ -1536,6 +1536,8 @@ EVENT_TYPE(DOWNLOAD_URL_REQUEST)
 //   }
 // The END event will occur when the download is interrupted, canceled or
 // completed.
+// DownloadItems that are loaded from history and are never active simply ADD
+// one of these events.
 EVENT_TYPE(DOWNLOAD_ITEM_ACTIVE)
 
 // This event is created when a download item has been checked by the
@@ -1546,13 +1548,6 @@ EVENT_TYPE(DOWNLOAD_ITEM_ACTIVE)
 //   }
 EVENT_TYPE(DOWNLOAD_ITEM_SAFETY_STATE_UPDATED)
 
-// This event is created when a download item has been inserted into the
-// history database.
-//   {
-//     "db_handle": <The database handle for the item>,
-//   }
-EVENT_TYPE(DOWNLOAD_ITEM_IN_HISTORY)
-
 // This event is created when a download item is updated.
 //   {
 //     "bytes_so_far": <Number of bytes received>,