Remove PathCloseFrame, QuicPathId, DefaultPathId and InvalidPathId.

net/quic/core/frames/quic_frame.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_CORE_FRAMES_QUIC_FRAME_H_
 #define NET_QUIC_CORE_FRAMES_QUIC_FRAME_H_
 
 #include <ostream>
 #include <vector>
 
 #include "net/quic/core/frames/quic_ack_frame.h"
 #include "net/quic/core/frames/quic_blocked_frame.h"
 #include "net/quic/core/frames/quic_connection_close_frame.h"
 #include "net/quic/core/frames/quic_frame.h"
 #include "net/quic/core/frames/quic_goaway_frame.h"
 #include "net/quic/core/frames/quic_mtu_discovery_frame.h"
 #include "net/quic/core/frames/quic_padding_frame.h"
-#include "net/quic/core/frames/quic_path_close_frame.h"
 #include "net/quic/core/frames/quic_ping_frame.h"
 #include "net/quic/core/frames/quic_rst_stream_frame.h"
 #include "net/quic/core/frames/quic_stop_waiting_frame.h"
 #include "net/quic/core/frames/quic_stream_frame.h"
 #include "net/quic/core/frames/quic_window_update_frame.h"
 #include "net/quic/core/quic_types.h"
 #include "net/quic/platform/api/quic_export.h"
 
 namespace net {
 
 struct QUIC_EXPORT_PRIVATE QuicFrame {
   QuicFrame();
   explicit QuicFrame(QuicPaddingFrame padding_frame);
   explicit QuicFrame(QuicMtuDiscoveryFrame frame);
   explicit QuicFrame(QuicPingFrame frame);
 
   explicit QuicFrame(QuicStreamFrame* stream_frame);
   explicit QuicFrame(QuicAckFrame* frame);
   explicit QuicFrame(QuicRstStreamFrame* frame);
   explicit QuicFrame(QuicConnectionCloseFrame* frame);
   explicit QuicFrame(QuicStopWaitingFrame* frame);
   explicit QuicFrame(QuicGoAwayFrame* frame);
   explicit QuicFrame(QuicWindowUpdateFrame* frame);
   explicit QuicFrame(QuicBlockedFrame* frame);
-  explicit QuicFrame(QuicPathCloseFrame* frame);
 
   QUIC_EXPORT_PRIVATE friend std::ostream& operator<<(std::ostream& os,
                                                       const QuicFrame& frame);
 
   QuicFrameType type;
   union {
     // Frames smaller than a pointer are inline.
     QuicPaddingFrame padding_frame;
     QuicMtuDiscoveryFrame mtu_discovery_frame;
     QuicPingFrame ping_frame;
 
     // Frames larger than a pointer.
     QuicStreamFrame* stream_frame;
     QuicAckFrame* ack_frame;
     QuicStopWaitingFrame* stop_waiting_frame;
     QuicRstStreamFrame* rst_stream_frame;
     QuicConnectionCloseFrame* connection_close_frame;
     QuicGoAwayFrame* goaway_frame;
     QuicWindowUpdateFrame* window_update_frame;
     QuicBlockedFrame* blocked_frame;
-    QuicPathCloseFrame* path_close_frame;
   };
 };
 // QuicFrameType consumes 8 bytes with padding.
 static_assert(sizeof(QuicFrame) <= 16,
               "Frames larger than 8 bytes should be referenced by pointer.");
 
 typedef std::vector<QuicFrame> QuicFrames;
 
 // Deletes all the sub-frames contained in |frames|.
 QUIC_EXPORT_PRIVATE void DeleteFrames(QuicFrames* frames);
 
 // Deletes all the QuicStreamFrames for the specified |stream_id|.
 QUIC_EXPORT_PRIVATE void RemoveFramesForStream(QuicFrames* frames,
                                                QuicStreamId stream_id);
 
 }  // namespace net
 
 #endif  // NET_QUIC_CORE_FRAMES_QUIC_FRAME_H_