Change the stream_id for streams which are serialized out of order.

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 757fb4c79fd8164263be785a1a5f16c697df543c..beb45176f891ce633f5b303c7e934924ecc73c8c 100644
--- a/net/base/net_log_event_type_list.h
+++ b/net/base/net_log_event_type_list.h
@@ -939,6 +939,14 @@ EVENT_TYPE(SPDY_SESSION)
 //   }
 EVENT_TYPE(SPDY_SESSION_SYN_STREAM)
 
+// This event is sent when a SPDY SYN_STREAM is renumbered.
+// The following parameters are attached:
+//   {
+//     "old_id": <The old stream id>,
+//     "new_id": <The new stream id>,
+//   }
+EVENT_TYPE(SPDY_SESSION_SYN_STREAM_RENUMBER)
+
 // This event is sent for a SPDY SYN_STREAM pushed by the server, where a
 // net::URLRequest is already waiting for the stream.
 // The following parameters are attached: