Change RtcpPacket::PacketReadyCallback to rtc::FunctionView

from interface


Bug: webrtc:5565
Change-Id: I2df5d7a0554b938888581f1c73dbdb8b85c387cc
Reviewed-on: https://webrtc-review.googlesource.com/8680
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21136}

modules/rtp_rtcp/source/rtcp_packet/nack.cc

@@ -84,7 +84,7 @@ size_t Nack::BlockLength() const {
 bool Nack::Create(uint8_t* packet,
                   size_t* index,
                   size_t max_length,
-                  RtcpPacket::PacketReadyCallback* callback) const {
+                  PacketReadyCallback callback) const {
   RTC_DCHECK(!packed_.empty());
   // If nack list can't fit in packet, try to fragment.
   constexpr size_t kNackHeaderLength = kHeaderLength + kCommonFeedbackLength;