Add class QuicMultipathReceivedPacketManager (not in use currently).

net/quic/quic_multipath_received_packet_manager.h

Index: net/quic/quic_multipath_received_packet_manager.h
diff --git a/net/quic/quic_multipath_received_packet_manager.h b/net/quic/quic_multipath_received_packet_manager.h
new file mode 100644
index 0000000000000000000000000000000000000000..e33c5fccdb6bea2f2a09540f5d73de1cdd1018c1
--- /dev/null
+++ b/net/quic/quic_multipath_received_packet_manager.h
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+// Copyright (c) 2015 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.
+
+// A connection level received packet manager which manages multiple per path
+// received packet managers.
+
+#ifndef NET_QUIC_QUIC_MULTIPATH_RECEIVED_PACKET_MANAGER_H_
+#define NET_QUIC_QUIC_MULTIPATH_RECEIVED_PACKET_MANAGER_H_
+
+#include <vector>
+
+#include "net/quic/quic_protocol.h"
+#include "net/quic/quic_received_packet_manager.h"
+
+namespace net {
+
+namespace test {
+class QuicMultipathReceivedPacketManagerPeer;
+}  // namespace test
+
+class NET_EXPORT_PRIVATE QuicMultipathReceivedPacketManager {
+ public:
+  typedef base::hash_map<QuicPathId, QuicReceivedPacketManager*>
+      MultipathReceivedPacketManagerMap;
+
+  explicit QuicMultipathReceivedPacketManager(QuicConnectionStats* stats);
+  ~QuicMultipathReceivedPacketManager();
+
+  // Called when a new path with |path_id| is created.
+  void OnPathCreated(QuicPathId path_id, QuicConnectionStats* stats);
+
+  // Called when path with |path_id| is closed.
+  void OnPathClosed(QuicPathId path_id);
+
+  // Records packet receipt information on path with |path_id|.
+  void RecordPacketReceived(QuicPathId path_id,
+                            QuicByteCount bytes,
+                            const QuicPacketHeader& header,
+                            QuicTime receipt_time);
+
+  // Called when packet with |packet_number| is revived on path with |path_id|.
+  void RecordPacketRevived(QuicPathId path_id, QuicPacketNumber packet_number);
+
+  // Checks whether |packet_number| is missing on path with |path_id|.
+  bool IsMissing(QuicPathId path_id, QuicPacketNumber packet_number);
+
+  // Checks if we're still waiting for the packet with |packet_number| on path
+  // with |path_id|.
+  bool IsAwaitingPacket(QuicPathId path_id, QuicPacketNumber packet_number);
+
+  // If |force_all_paths| is false, populates ack information for paths whose
+  // ack has been updated since UpdateReceivedPacketInfo was called last time.
+  // Otherwise, populates ack for all paths.
+  void UpdateReceivedPacketInfo(std::vector<QuicAckFrame>* ack_frames,
+                                QuicTime approximate_now,
+                                bool force_all_paths);
+
+  // Updates internal state based on stop_waiting frames for corresponding path.
+  void UpdatePacketInformationSentByPeer(
+      const std::vector<QuicStopWaitingFrame>& stop_waitings);
+
+  // Returns true when there are new missing packets to be reported within 3
+  // packets of the largest observed on path with |path_id|.
+  bool HasNewMissingPackets(QuicPathId path_id) const;
+
+  QuicPacketNumber GetPeerLeastPacketAwaitingAck(QuicPathId path_id);
+
+ private:
+  friend class test::QuicMultipathReceivedPacketManagerPeer;
+
+  // Map mapping path id to path received packet manager.
+  MultipathReceivedPacketManagerMap path_managers_;
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_QUIC_MULTIPATH_RECEIVED_PACKET_MANAGER_H_