Remove RTPVideoHeader::vp8() accessors.

Bug: none
Change-Id: Ia7d65148fb36a8f26647bee8a876ce7217ff8a68
Reviewed-on: https://webrtc-review.googlesource.com/93321
Reviewed-by: Niels Moller <nisse@webrtc.org>
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@{#24626}
diff --git a/modules/video_coding/video_receiver_unittest.cc b/modules/video_coding/video_receiver_unittest.cc
index bec1e96..0b32daa 100644
--- a/modules/video_coding/video_receiver_unittest.cc
+++ b/modules/video_coding/video_receiver_unittest.cc
@@ -129,6 +129,7 @@
   header.header.ssrc = 1;
   header.header.headerLength = 12;
   header.video_header().codec = kVideoCodecVP8;
+  header.video_header().video_type_header.emplace<RTPVideoHeaderVP8>();
   // Insert one video frame to get one frame decoded.
   header.frameType = kVideoFrameKey;
   header.video_header().is_first_packet_in_frame = true;
@@ -180,8 +181,10 @@
   header.header.ssrc = 1;
   header.header.headerLength = 12;
   header.video_header().codec = kVideoCodecVP8;
-  header.video_header().vp8().pictureId = -1;
-  header.video_header().vp8().tl0PicIdx = -1;
+  auto& vp8_header =
+      header.video.video_type_header.emplace<RTPVideoHeaderVP8>();
+  vp8_header.pictureId = -1;
+  vp8_header.tl0PicIdx = -1;
   for (int i = 0; i < 3; ++i) {
     // Insert 2 video frames.
     for (int j = 0; j < 2; ++j) {