Delete in_order argument to RtpReceiver::IncomingRtpPacket

Bug: webrtc:7135
Change-Id: I35fbc76a5ca8d50caff918bbfd2cb13dce4cbd21
Reviewed-on: https://webrtc-review.googlesource.com/4141
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20154}
diff --git a/voice_engine/channel.h b/voice_engine/channel.h
index 9221115..9a79b2b 100644
--- a/voice_engine/channel.h
+++ b/voice_engine/channel.h
@@ -341,8 +341,7 @@
 
   bool ReceivePacket(const uint8_t* packet,
                      size_t packet_length,
-                     const RTPHeader& header,
-                     bool in_order);
+                     const RTPHeader& header);
   bool IsPacketInOrder(const RTPHeader& header) const;
   bool IsPacketRetransmitted(const RTPHeader& header, bool in_order) const;
   int ResendPackets(const uint16_t* sequence_numbers, int length);