Add support for fragmentation in RtcpPacket.

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc

 /*
  *  Copyright (c) 2013 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 200 matching lines @@
 
   void IncomingRtcpNack(const RtpRtcpModule* module, uint16_t sequence_number) {
     bool sender = module->impl_->SSRC() == kSenderSsrc;
     rtcp::Nack nack;
     uint16_t list[1];
     list[0] = sequence_number;
     const uint16_t kListLength = sizeof(list) / sizeof(list[0]);
     nack.From(sender ? kReceiverSsrc : kSenderSsrc);
     nack.To(sender ? kSenderSsrc : kReceiverSsrc);
     nack.WithList(list, kListLength);
-    rtcp::RawPacket packet = nack.Build();
-    EXPECT_EQ(0, module->impl_->IncomingRtcpPacket(packet.buffer(),
-                                                   packet.buffer_length()));
+    rtc::scoped_ptr<rtcp::RawPacket> packet(nack.Build());
+    EXPECT_EQ(0, module->impl_->IncomingRtcpPacket(packet->Buffer(),
+                                                   packet->Length()));
   }
 };
 
 TEST_F(RtpRtcpImplTest, SetSelectiveRetransmissions_BaseLayer) {
   sender_.impl_->SetSelectiveRetransmissions(kRetransmitBaseLayer);
   EXPECT_EQ(kRetransmitBaseLayer, sender_.impl_->SelectiveRetransmissions());
 
   // Send frames.
   EXPECT_EQ(0, sender_.RtpSent());
   SendFrame(&sender_, kBaseLayerTid);    // kSequenceNumber
@@ skipping 282 matching lines @@
   EXPECT_THAT(receiver_.LastNackListSent(), ElementsAre(11, 18, 20, 21));
 
   // Send module receives the request.
   EXPECT_EQ(2U, sender_.RtcpReceived().nack_packets);
   EXPECT_EQ(8U, sender_.RtcpReceived().nack_requests);
   EXPECT_EQ(6U, sender_.RtcpReceived().unique_nack_requests);
   EXPECT_EQ(75, sender_.RtcpReceived().UniqueNackRequestsInPercent());
 }
 
 }  // namespace webrtc