Reland "Remove RTPVideoHeader::vp8() accessors."

This reverts commit 1811c04f22a26da3ed2832373a5c92a9786420c3.

Reason for revert: Downstream projects fixed.

Original change's description:
> Revert "Remove RTPVideoHeader::vp8() accessors."
> 
> This reverts commit af7afc66427b0e9109e7d492f2805d63d239b914.
> 
> Reason for revert: Break downstream projects.
> 
> Original change's description:
> > 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}
> 
> TBR=danilchap@webrtc.org,nisse@webrtc.org,sprang@webrtc.org,stefan@webrtc.org,philipel@webrtc.org,holmer@google.com
> 
> Change-Id: I3f7f19c0ea810c0fd988c59e6556bbea9b756b33
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: none
> Reviewed-on: https://webrtc-review.googlesource.com/98864
> Reviewed-by: Philip Eliasson <philipel@webrtc.org>
> Commit-Queue: Philip Eliasson <philipel@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#24628}

TBR=danilchap@webrtc.org,nisse@webrtc.org,sprang@webrtc.org,stefan@webrtc.org,philipel@webrtc.org,holmer@google.com

Change-Id: I9246f36e638108ae4fc46c1ae4559c8205d50fc1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: none
Reviewed-on: https://webrtc-review.googlesource.com/98841
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24629}
diff --git a/modules/video_coding/decoding_state_unittest.cc b/modules/video_coding/decoding_state_unittest.cc
index 0049ca7..82c6f12 100644
--- a/modules/video_coding/decoding_state_unittest.cc
+++ b/modules/video_coding/decoding_state_unittest.cc
@@ -37,7 +37,9 @@
   packet.seqNum = 0xffff;
   packet.frameType = kVideoFrameDelta;
   packet.video_header.codec = kVideoCodecVP8;
-  packet.video_header.vp8().pictureId = 0x007F;
+  auto& vp8_header =
+      packet.video_header.video_type_header.emplace<RTPVideoHeaderVP8>();
+  vp8_header.pictureId = 0x007F;
   FrameData frame_data;
   frame_data.rtt_ms = 0;
   frame_data.rolling_average_packets_per_frame = -1;
@@ -53,17 +55,17 @@
   packet.frameType = kVideoFrameDelta;
   // Use pictureId
   packet.is_first_packet_in_frame = false;
-  packet.video_header.vp8().pictureId = 0x0002;
+  vp8_header.pictureId = 0x0002;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
   frame.Reset();
-  packet.video_header.vp8().pictureId = 0;
+  vp8_header.pictureId = 0;
   packet.seqNum = 10;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
 
   // Use sequence numbers.
-  packet.video_header.vp8().pictureId = kNoPictureId;
+  vp8_header.pictureId = kNoPictureId;
   frame.Reset();
   packet.seqNum = dec_state.sequence_num() - 1u;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
@@ -82,9 +84,9 @@
   // Insert packet with temporal info.
   dec_state.Reset();
   frame.Reset();
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 0;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 0;
   packet.seqNum = 1;
   packet.timestamp = 1;
   EXPECT_TRUE(dec_state.full_sync());
@@ -93,9 +95,9 @@
   EXPECT_TRUE(dec_state.full_sync());
   frame.Reset();
   // 1 layer up - still good.
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 1;
-  packet.video_header.vp8().pictureId = 1;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 1;
+  vp8_header.pictureId = 1;
   packet.seqNum = 2;
   packet.timestamp = 2;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
@@ -104,18 +106,18 @@
   EXPECT_TRUE(dec_state.full_sync());
   frame.Reset();
   // Lost non-base layer packet => should update sync parameter.
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 3;
-  packet.video_header.vp8().pictureId = 3;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 3;
+  vp8_header.pictureId = 3;
   packet.seqNum = 4;
   packet.timestamp = 4;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
   // Now insert the next non-base layer (belonging to a next tl0PicId).
   frame.Reset();
-  packet.video_header.vp8().tl0PicIdx = 1;
-  packet.video_header.vp8().temporalIdx = 2;
-  packet.video_header.vp8().pictureId = 4;
+  vp8_header.tl0PicIdx = 1;
+  vp8_header.temporalIdx = 2;
+  vp8_header.pictureId = 4;
   packet.seqNum = 5;
   packet.timestamp = 5;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
@@ -125,9 +127,9 @@
   EXPECT_TRUE(dec_state.full_sync());
   // Next base layer (dropped interim non-base layers) - should update sync.
   frame.Reset();
-  packet.video_header.vp8().tl0PicIdx = 1;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 5;
+  vp8_header.tl0PicIdx = 1;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 5;
   packet.seqNum = 6;
   packet.timestamp = 6;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
@@ -137,18 +139,18 @@
 
   // Check wrap for temporal layers.
   frame.Reset();
-  packet.video_header.vp8().tl0PicIdx = 0x00FF;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 6;
+  vp8_header.tl0PicIdx = 0x00FF;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 6;
   packet.seqNum = 7;
   packet.timestamp = 7;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   dec_state.SetState(&frame);
   EXPECT_FALSE(dec_state.full_sync());
   frame.Reset();
-  packet.video_header.vp8().tl0PicIdx = 0x0000;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 7;
+  vp8_header.tl0PicIdx = 0x0000;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 7;
   packet.seqNum = 8;
   packet.timestamp = 8;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
@@ -214,9 +216,11 @@
   packet.video_header.codec = kVideoCodecVP8;
   packet.timestamp = 0;
   packet.seqNum = 0;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 0;
+  auto& vp8_header =
+      packet.video_header.video_type_header.emplace<RTPVideoHeaderVP8>();
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 0;
   FrameData frame_data;
   frame_data.rtt_ms = 0;
   frame_data.rolling_average_packets_per_frame = -1;
@@ -226,9 +230,9 @@
   frame.Reset();
   packet.timestamp = 1;
   packet.seqNum = 1;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 1;
-  packet.video_header.vp8().pictureId = 1;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 1;
+  vp8_header.pictureId = 1;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
@@ -238,9 +242,9 @@
   frame.Reset();
   packet.timestamp = 3;
   packet.seqNum = 3;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 3;
-  packet.video_header.vp8().pictureId = 3;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 3;
+  vp8_header.pictureId = 3;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
@@ -249,9 +253,9 @@
   frame.Reset();
   packet.timestamp = 4;
   packet.seqNum = 4;
-  packet.video_header.vp8().tl0PicIdx = 1;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 4;
+  vp8_header.tl0PicIdx = 1;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 4;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
@@ -263,9 +267,9 @@
   packet.is_first_packet_in_frame = 1;
   packet.timestamp = 5;
   packet.seqNum = 5;
-  packet.video_header.vp8().tl0PicIdx = 2;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 5;
+  vp8_header.tl0PicIdx = 2;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 5;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
@@ -276,9 +280,9 @@
   packet.frameType = kVideoFrameDelta;
   packet.timestamp = 6;
   packet.seqNum = 6;
-  packet.video_header.vp8().tl0PicIdx = 3;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 6;
+  vp8_header.tl0PicIdx = 3;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 6;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   EXPECT_TRUE(dec_state.full_sync());
@@ -287,9 +291,9 @@
   packet.is_first_packet_in_frame = 1;
   packet.timestamp = 8;
   packet.seqNum = 8;
-  packet.video_header.vp8().tl0PicIdx = 4;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 8;
+  vp8_header.tl0PicIdx = 4;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 8;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
   EXPECT_TRUE(dec_state.full_sync());
@@ -302,10 +306,10 @@
   packet.is_first_packet_in_frame = 1;
   packet.timestamp = 9;
   packet.seqNum = 9;
-  packet.video_header.vp8().tl0PicIdx = 4;
-  packet.video_header.vp8().temporalIdx = 2;
-  packet.video_header.vp8().pictureId = 9;
-  packet.video_header.vp8().layerSync = true;
+  vp8_header.tl0PicIdx = 4;
+  vp8_header.temporalIdx = 2;
+  vp8_header.pictureId = 9;
+  vp8_header.layerSync = true;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   dec_state.SetState(&frame);
   EXPECT_TRUE(dec_state.full_sync());
@@ -323,10 +327,10 @@
   packet.markerBit = 1;
   packet.timestamp = 0;
   packet.seqNum = 0;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 0;
-  packet.video_header.vp8().layerSync = false;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 0;
+  vp8_header.layerSync = false;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   dec_state.SetState(&frame);
   EXPECT_TRUE(dec_state.full_sync());
@@ -337,10 +341,10 @@
   packet.markerBit = 0;
   packet.timestamp = 1;
   packet.seqNum = 1;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 2;
-  packet.video_header.vp8().pictureId = 1;
-  packet.video_header.vp8().layerSync = true;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 2;
+  vp8_header.pictureId = 1;
+  vp8_header.layerSync = true;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   // Layer 1
@@ -350,10 +354,10 @@
   packet.markerBit = 1;
   packet.timestamp = 2;
   packet.seqNum = 3;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 1;
-  packet.video_header.vp8().pictureId = 2;
-  packet.video_header.vp8().layerSync = true;
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 1;
+  vp8_header.pictureId = 2;
+  vp8_header.layerSync = true;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
   EXPECT_TRUE(dec_state.full_sync());
@@ -368,9 +372,11 @@
   packet.video_header.codec = kVideoCodecVP8;
   packet.timestamp = 0;
   packet.seqNum = 0;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 0;
+  auto& vp8_header =
+      packet.video_header.video_type_header.emplace<RTPVideoHeaderVP8>();
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 0;
   FrameData frame_data;
   frame_data.rtt_ms = 0;
   frame_data.rolling_average_packets_per_frame = -1;
@@ -384,8 +390,8 @@
   packet.frameType = kVideoFrameDelta;
   packet.timestamp += 3000;
   ++packet.seqNum;
-  packet.video_header.vp8().temporalIdx = 1;
-  packet.video_header.vp8().pictureId = 2;
+  vp8_header.temporalIdx = 1;
+  vp8_header.pictureId = 2;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
   dec_state.SetState(&frame);
@@ -421,9 +427,11 @@
   packet.video_header.codec = kVideoCodecVP8;
   packet.timestamp = 0;
   packet.seqNum = 0;
-  packet.video_header.vp8().tl0PicIdx = 0;
-  packet.video_header.vp8().temporalIdx = 0;
-  packet.video_header.vp8().pictureId = 0;
+  auto& vp8_header =
+      packet.video_header.video_type_header.emplace<RTPVideoHeaderVP8>();
+  vp8_header.tl0PicIdx = 0;
+  vp8_header.temporalIdx = 0;
+  vp8_header.pictureId = 0;
   FrameData frame_data;
   frame_data.rtt_ms = 0;
   frame_data.rolling_average_packets_per_frame = -1;
@@ -433,15 +441,15 @@
   frame.Reset();
   ++packet.timestamp;
   ++packet.seqNum;
-  packet.video_header.vp8().temporalIdx++;
-  packet.video_header.vp8().pictureId++;
+  vp8_header.temporalIdx++;
+  vp8_header.pictureId++;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_TRUE(dec_state.ContinuousFrame(&frame));
   frame.Reset();
   // Testing only gap in tl0PicIdx when tl0PicIdx in continuous.
-  packet.video_header.vp8().tl0PicIdx += 3;
-  packet.video_header.vp8().temporalIdx++;
-  packet.video_header.vp8().tl0PicIdx = 1;
+  vp8_header.tl0PicIdx += 3;
+  vp8_header.temporalIdx++;
+  vp8_header.tl0PicIdx = 1;
   EXPECT_LE(0, frame.InsertPacket(packet, 0, kNoErrors, frame_data));
   EXPECT_FALSE(dec_state.ContinuousFrame(&frame));
 }