Revert "Revert of Use sps and pps to determine decodability of H.264 frames. (patchset #4 id:60001 of https://codereview.webrtc.org/2341713002/ )"

This reverts commit 3cdfcd88a14449a9b116cb6149e1348d3a1e4cb2.

NOPRESUBMIT=true
BUG=webrtc:6208

Review-Url: https://codereview.webrtc.org/2385143002
Cr-Commit-Position: refs/heads/master@{#14551}
diff --git a/webrtc/modules/video_coding/frame_buffer.cc b/webrtc/modules/video_coding/frame_buffer.cc
index b332a00c..bb8ec93 100644
--- a/webrtc/modules/video_coding/frame_buffer.cc
+++ b/webrtc/modules/video_coding/frame_buffer.cc
@@ -66,6 +66,10 @@
   return _sessionInfo.NonReference();
 }
 
+std::vector<NaluInfo> VCMFrameBuffer::GetNaluInfos() const {
+  return _sessionInfo.GetNaluInfos();
+}
+
 void VCMFrameBuffer::SetGofInfo(const GofInfoVP9& gof_info, size_t idx) {
   _sessionInfo.SetGofInfo(gof_info, idx);
   // TODO(asapersson): Consider adding hdr->VP9.ref_picture_id for testing.