short circuit QUIC packets to packet buffer if there is already a CHLO on same connection buffered …

net/tools/quic/quic_dispatcher.h

 // Copyright (c) 2012 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 server side dispatcher which dispatches a given client's data to their
 // stream.
 
 #ifndef NET_TOOLS_QUIC_QUIC_DISPATCHER_H_
 #define NET_TOOLS_QUIC_QUIC_DISPATCHER_H_
 
@@ skipping 179 matching lines @@
   // This method is called by OnUnauthenticatedHeader on packets not associated
   // with a known connection ID.  It applies validity checks and returns a
   // QuicPacketFate to tell what should be done with the packet.
   virtual QuicPacketFate ValidityChecks(const QuicPacketHeader& header);
 
   // Create and return the time wait list manager for this dispatcher, which
   // will be owned by the dispatcher as time_wait_list_manager_
   virtual QuicTimeWaitListManager* CreateQuicTimeWaitListManager();
 
   // Called when |current_packet_| is a data packet that has arrived before
-  // the CHLO. Buffers the current packet until the CHLO arrives.
+  // the CHLO or it is any kind of packet while a CHLO on same connection has
+  // already been in the buffer.
   void BufferEarlyPacket(QuicConnectionId connection_id);
 
   // Called when |current_packet_| is a CHLO packet. Creates a new connection
   // and delivers any buffered packets for that connection id.
   void ProcessChlo();
 
   QuicTimeWaitListManager* time_wait_list_manager() {
     return time_wait_list_manager_.get();
   }
 
@@ skipping 150 matching lines @@
   // A backward counter of how many new sessions can be create within current
   // event loop. When reaches 0, it means can't create sessions for now.
   int16_t new_sessions_allowed_per_event_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicDispatcher);
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_QUIC_DISPATCHER_H_