Move Quic AppendTimestampFrame method out of AppendCongestionFrame.

net/quic/quic_protocol.h

Index: net/quic/quic_protocol.h
diff --git a/net/quic/quic_protocol.h b/net/quic/quic_protocol.h
index ec94e4c7e57cbf534756a95b8d59117e6b99afaa..16adbb7deb83777e6b3195eb5504a16ddaf5926e 100644
--- a/net/quic/quic_protocol.h
+++ b/net/quic/quic_protocol.h
@@ -700,7 +700,7 @@ void NET_EXPORT_PRIVATE InsertMissingPacketsBetween(
 // compatibility.
 enum CongestionFeedbackType {
   kTCP,  // Used to mimic TCP.
-  kInterArrival,  // Use additional inter arrival information.
+  kTimestamp,  // Use additional inter arrival timestamp information.
 };
 
 // Defines for all types of congestion control algorithms that can be used in
@@ -724,9 +724,9 @@ struct NET_EXPORT_PRIVATE CongestionFeedbackMessageTCP {
   QuicByteCount receive_window;
 };
 
-struct NET_EXPORT_PRIVATE CongestionFeedbackMessageInterArrival {
-  CongestionFeedbackMessageInterArrival();
-  ~CongestionFeedbackMessageInterArrival();
+struct NET_EXPORT_PRIVATE CongestionFeedbackMessageTimestamp {
+  CongestionFeedbackMessageTimestamp();
+  ~CongestionFeedbackMessageTimestamp();
 
   // The set of received packets since the last feedback was sent, along with
   // their arrival times.
@@ -741,10 +741,10 @@ struct NET_EXPORT_PRIVATE QuicCongestionFeedbackFrame {
       std::ostream& os, const QuicCongestionFeedbackFrame& c);
 
   CongestionFeedbackType type;
-  // This should really be a union, but since the inter arrival struct
+  // This should really be a union, but since the timestamp struct
   // is non-trivial, C++ prohibits it.
   CongestionFeedbackMessageTCP tcp;
-  CongestionFeedbackMessageInterArrival inter_arrival;
+  CongestionFeedbackMessageTimestamp timestamp;
 };
 
 struct NET_EXPORT_PRIVATE QuicRstStreamFrame {