Add ParsedPayload::video_header() accessor.

Preparation CL to remove RTPTypeHeader.

Bug: none
Change-Id: I695acf20082b94744a2f6c7692f1b2128932cd79
Reviewed-on: https://webrtc-review.googlesource.com/86132
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23835}
diff --git a/modules/video_coding/jitter_buffer_unittest.cc b/modules/video_coding/jitter_buffer_unittest.cc
index 71c17ea..45b2c2d 100644
--- a/modules/video_coding/jitter_buffer_unittest.cc
+++ b/modules/video_coding/jitter_buffer_unittest.cc
@@ -242,7 +242,7 @@
     rtpHeader.header.timestamp = timestamp_;
     rtpHeader.header.markerBit = true;
     rtpHeader.frameType = kVideoFrameDelta;
-    rtpHeader.type.Video.codec = kVideoCodecUnknown;
+    rtpHeader.video_header().codec = kVideoCodecUnknown;
     packet_.reset(new VCMPacket(data_, size_, rtpHeader));
   }
 
@@ -800,7 +800,7 @@
   rtpHeader.header.sequenceNumber = seq_num_ + 2;
   rtpHeader.header.timestamp = timestamp_ + (33 * 90);
   rtpHeader.header.markerBit = false;
-  rtpHeader.type.Video.codec = kVideoCodecUnknown;
+  rtpHeader.video_header().codec = kVideoCodecUnknown;
   VCMPacket empty_packet(data_, 0, rtpHeader);
   EXPECT_EQ(kOldPacket,
             jitter_buffer_->InsertPacket(empty_packet, &retransmitted));
@@ -2164,7 +2164,7 @@
   timestamp_ += 33 * 90;
   WebRtcRTPHeader rtpHeader;
   memset(&rtpHeader, 0, sizeof(rtpHeader));
-  rtpHeader.type.Video.codec = kVideoCodecUnknown;
+  rtpHeader.video_header().codec = kVideoCodecUnknown;
   VCMPacket emptypacket(data_, 0, rtpHeader);
   emptypacket.seqNum = seq_num_;
   emptypacket.timestamp = timestamp_;