Link HttpStreams to QuicSessions in net-internals.

net/log/net_log_event_type_list.h

Index: net/log/net_log_event_type_list.h
diff --git a/net/log/net_log_event_type_list.h b/net/log/net_log_event_type_list.h
index 175f545363bfa2e4c4bbd62c39a03ef84ea19562..ee7a5994837aa15f2413300a7b1758b47ae28968 100644
--- a/net/log/net_log_event_type_list.h
+++ b/net/log/net_log_event_type_list.h
@@ -1722,6 +1722,13 @@ EVENT_TYPE(QUIC_HTTP_STREAM_SEND_REQUEST_HEADERS)
 //   }
 EVENT_TYPE(QUIC_HTTP_STREAM_READ_RESPONSE_HEADERS)
 
+// Identifies the NetLog::Source() for the QuicSesssion that handled the stream.
+// The event parameters are:
+//   {
+//      "source_dependency": <Source identifier for session that was used>,
+//   }
+EVENT_TYPE(HTTP_STREAM_REQUEST_BOUND_TO_QUIC_SESSION)
+
 // ------------------------------------------------------------------------
 // HttpStreamParser
 // ------------------------------------------------------------------------