Fixing flaky test: WebRtcSessionTest.TestPacketOptionsAndOnPacketSent

webrtc/media/engine/fakewebrtccall.cc

 /*
  *  Copyright (c) 2015 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 447 matching lines @@
       break;
     case webrtc::MediaType::DATA:
     case webrtc::MediaType::ANY:
       ADD_FAILURE()
           << "SignalChannelNetworkState called with unknown parameter.";
   }
 }
 
 void FakeCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   last_sent_packet_ = sent_packet;
+  if (sent_packet.packet_id >= 0) {
+    last_sent_nonnegative_packet_id_ = sent_packet.packet_id;
+  }
 }
+
 }  // namespace cricket