Remove the QuicDispatcher's explicit use of EpollServer.

net/tools/quic/test_tools/packet_dropping_test_writer.h

 // Copyright 2013 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_TOOLS_QUIC_TEST_TOOLS_PACKET_DROPPING_TEST_WRITER_H_
 #define NET_TOOLS_QUIC_TEST_TOOLS_PACKET_DROPPING_TEST_WRITER_H_
 
 #include <list>
 #include <string>
 
@@ skipping 25 matching lines @@
   };
 
   PacketDroppingTestWriter();
 
   ~PacketDroppingTestWriter() override;
 
   // Must be called before blocking, reordering or delaying (loss is OK). May be
   // called after connecting if the helper is not available before.
   // |on_can_write| will be triggered when fake-unblocking; ownership will be
   // assumed.
-  void Initialize(QuicEpollConnectionHelper* helper, Delegate* on_can_write);
+  void Initialize(QuicConnectionHelperInterface* helper,
+                  Delegate* on_can_write);
 
   // QuicPacketWriter methods:
   WriteResult WritePacket(const char* buffer,
                           size_t buf_len,
                           const IPAddressNumber& self_address,
                           const IPEndPoint& peer_address) override;
 
   bool IsWriteBlocked() const override;
 
   void SetWritable() override;
@@ skipping 93 matching lines @@
   QuicByteCount buffer_size_;
 
   DISALLOW_COPY_AND_ASSIGN(PacketDroppingTestWriter);
 };
 
 }  // namespace test
 }  // namespace tools
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_TEST_TOOLS_PACKET_DROPPING_TEST_WRITER_H_