Move test for incoming packets with incorrect connection ID from

net/quic/quic_connection.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.
 //
 // The entity that handles framing writes for a Quic client or server.
 // Each QuicSession will have a connection associated with it.
 //
 // On the server side, the Dispatcher handles the raw reads, and hands off
 // packets via ProcessUdpPacket for framing and processing.
 //
@@ skipping 311 matching lines @@
   virtual void SendGoAway(QuicErrorCode error,
                           QuicStreamId last_good_stream_id,
                           const std::string& reason);
 
   // Returns statistics tracked for this connection.
   const QuicConnectionStats& GetStats();
 
   // Processes an incoming UDP packet (consisting of a QuicEncryptedPacket) from
   // the peer.  If processing this packet permits a packet to be revived from
   // its FEC group that packet will be revived and processed.
+  // In a client, the packet may be "stray" and have a different connection ID
+  // than that of this connection.
   virtual void ProcessUdpPacket(const IPEndPoint& self_address,
                                 const IPEndPoint& peer_address,
                                 const QuicEncryptedPacket& packet);
 
   // QuicBlockedWriterInterface
   // Called when the underlying connection becomes writable to allow queued
   // writes to happen.
   void OnCanWrite() override;
 
   // Called when an error occurs while attempting to write a packet to the
@@ skipping 508 matching lines @@
 
   // True if this is a secure QUIC connection.
   bool is_secure_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_