net: Cleanup class/struct forward declarations

net/quic/test_tools/simple_quic_framer.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.
 
 #ifndef NET_QUIC_TEST_TOOLS_SIMPLE_QUIC_FRAMER_H_
 #define NET_QUIC_TEST_TOOLS_SIMPLE_QUIC_FRAMER_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "net/quic/core/quic_framer.h"
 #include "net/quic/core/quic_protocol.h"
 
 namespace net {
 
 struct QuicAckFrame;
-class QuicConnection;
-class QuicConnectionVisitorInterface;
-class QuicPacketCreator;
-class SendAlgorithmInterface;
 
 namespace test {
 
 class SimpleFramerVisitor;
 
 // Peer to make public a number of otherwise private QuicFramer methods.
 class SimpleQuicFramer {
  public:
   SimpleQuicFramer();
   explicit SimpleQuicFramer(const QuicVersionVector& supported_versions);
@@ skipping 25 matching lines @@
   QuicFramer framer_;
   std::unique_ptr<SimpleFramerVisitor> visitor_;
   DISALLOW_COPY_AND_ASSIGN(SimpleQuicFramer);
 };
 
 }  // namespace test
 
 }  // namespace net
 
 #endif  // NET_QUIC_TEST_TOOLS_SIMPLE_QUIC_FRAMER_H_