Add pps id and sps id parsing to the h.264 depacketizer.

webrtc/common_video/h264/sps_parser.cc

Index: webrtc/common_video/h264/sps_parser.cc
diff --git a/webrtc/common_video/h264/sps_parser.cc b/webrtc/common_video/h264/sps_parser.cc
index cf4b36d1238b798025792d6569e11a3c32011e44..86a39de83f522aaa8796c617650e1f1606a4a33e 100644
--- a/webrtc/common_video/h264/sps_parser.cc
+++ b/webrtc/common_video/h264/sps_parser.cc
@@ -10,6 +10,8 @@
 
 #include "webrtc/common_video/h264/sps_parser.h"
 
+#include <memory>
+
 #include "webrtc/common_video/h264/h264_common.h"
 #include "webrtc/base/bitbuffer.h"
 #include "webrtc/base/bytebuffer.h"
@@ -68,7 +70,7 @@ rtc::Optional<SpsParser::SpsState> SpsParser::ParseSpsUpToVui(
   // level_idc: u(8)
   RETURN_EMPTY_ON_FAIL(buffer->ConsumeBytes(1));
   // seq_parameter_set_id: ue(v)
-  RETURN_EMPTY_ON_FAIL(buffer->ReadExponentialGolomb(&golomb_ignored));
+  RETURN_EMPTY_ON_FAIL(buffer->ReadExponentialGolomb(&sps.id));
   sps.separate_colour_plane_flag = 0;
   // See if profile_idc has chroma format information.
   if (profile_idc == 100 || profile_idc == 110 || profile_idc == 122 ||