Make FlexfecReceiver a concrete class.

webrtc/test/fuzzers/flexfec_receiver_fuzzer.cc

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 21 matching lines @@
   uint32_t flexfec_ssrc;
   memcpy(&flexfec_ssrc, data + 0, 4);
   uint16_t flexfec_seq_num;
   memcpy(&flexfec_seq_num, data + 4, 2);
   uint32_t media_ssrc;
   memcpy(&media_ssrc, data + 6, 4);
   uint16_t media_seq_num;
   memcpy(&media_seq_num, data + 10, 2);
 
   DummyCallback callback;
-  std::unique_ptr<FlexfecReceiver> receiver =
-      FlexfecReceiver::Create(flexfec_ssrc, media_ssrc, &callback);
+  FlexfecReceiver receiver(flexfec_ssrc, media_ssrc, &callback);
 
   std::unique_ptr<uint8_t[]> packet;
   size_t packet_length;
   size_t i = kMinDataNeeded;
   while (i < size) {
     packet_length = kRtpHeaderSize + data[i++];
     packet = std::unique_ptr<uint8_t[]>(new uint8_t[packet_length]);
     if (i + packet_length >= size) {
       break;
     }
     memcpy(packet.get(), data + i, packet_length);
     i += packet_length;
     if (i < size && data[i++] % 2 == 0) {
       // Simulate FlexFEC packet.
       ByteWriter<uint16_t>::WriteBigEndian(packet.get() + 2, flexfec_seq_num++);
       ByteWriter<uint32_t>::WriteBigEndian(packet.get() + 8, flexfec_ssrc);
     } else {
       // Simulate media packet.
       ByteWriter<uint16_t>::WriteBigEndian(packet.get() + 2, media_seq_num++);
       ByteWriter<uint32_t>::WriteBigEndian(packet.get() + 8, media_ssrc);
     }
-    receiver->AddAndProcessReceivedPacket(packet.get(), packet_length);
+    receiver.AddAndProcessReceivedPacket(packet.get(), packet_length);
   }
 }
 
 }  // namespace webrtc