In RtpPacket do not keep pointer to RtpHeaderExtensionMap

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 a84e5f87f1343f569429691931570c8cb22512d7..fc88497b192138647579d36d4862263049e59153 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_packet_unittest.cc
@@ -293,7 +293,7 @@ TEST(RtpPacketTest, ParseWithExtensionDelayed) {
 
   int32_t time_offset;
   EXPECT_FALSE(packet.GetExtension<TransmissionOffset>(&time_offset));
-  packet.IdentifyExtensions(&extensions);
+  packet.IdentifyExtensions(extensions);
   EXPECT_TRUE(packet.GetExtension<TransmissionOffset>(&time_offset));
   EXPECT_EQ(kTimeOffset, time_offset);
   EXPECT_EQ(0u, packet.payload_size());