[Net] Propagate priority changes from URLRequest to HttpTransaction

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 75291d5b2b8c7a9bf8a77f85ef9d0e252a27a044..ae220a914949f652d7e98595fc2e0fd122376d5c 100644
--- a/net/base/net_log_event_type_list.h
+++ b/net/base/net_log_event_type_list.h
@@ -731,6 +731,14 @@ EVENT_TYPE(URL_REQUEST_BLOCKED_ON_DELEGATE)
 EVENT_TYPE(URL_REQUEST_JOB_BYTES_READ)
 EVENT_TYPE(URL_REQUEST_JOB_FILTERED_BYTES_READ)
 
+// This event is sent when the priority of a net::URLRequest is
+// changed after it has started. The parameters attached to this event
+// are:
+//   {
+//     "priority": <Numerical value of the priority (higher is more important)>,
+//   }
+EVENT_TYPE(URL_REQUEST_SET_PRIORITY)
+
 // ------------------------------------------------------------------------
 // HttpCache
 // ------------------------------------------------------------------------