RtpPacketHistory rewritten to use RtpPacket class.

webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc b/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
index b992d2da909345272eb4de4c84bab955d7ce1a4b..68c09a6e1c70f22c9009b4c5925251436e2dec17 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
@@ -162,12 +162,12 @@ TEST(RtpPacketTest, ParseMinimum) {
 }
 
 TEST(RtpPacketTest, ParseBuffer) {
-  rtc::Buffer unparsed(kMinimumPacket);
+  rtc::CopyOnWriteBuffer unparsed(kMinimumPacket);
   const uint8_t* raw = unparsed.data();
 
   RtpPacketReceived packet;
   EXPECT_TRUE(packet.Parse(std::move(unparsed)));
-  EXPECT_EQ(raw, packet.data());  // Expect packet took over the buffer.
+  EXPECT_EQ(raw, packet.data());  // Expect packet take the buffer without copy.
   EXPECT_EQ(kSeqNum, packet.SequenceNumber());
   EXPECT_EQ(kTimestamp, packet.Timestamp());
   EXPECT_EQ(kSsrc, packet.Ssrc());