Use sps and pps to determine decodability of H.264 frames.

webrtc/modules/video_coding/frame_buffer.h

Index: webrtc/modules/video_coding/frame_buffer.h
diff --git a/webrtc/modules/video_coding/frame_buffer.h b/webrtc/modules/video_coding/frame_buffer.h
index f5a707efe4d275d581d7cb6e3ee81896f75acaff..95c598534c4fe6c054d9e96a5da0a353aa7fabf5 100644
--- a/webrtc/modules/video_coding/frame_buffer.h
+++ b/webrtc/modules/video_coding/frame_buffer.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_MODULES_VIDEO_CODING_FRAME_BUFFER_H_
 #define WEBRTC_MODULES_VIDEO_CODING_FRAME_BUFFER_H_
 
+#include <vector>
+
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/video_coding/include/video_coding.h"
 #include "webrtc/modules/video_coding/encoded_frame.h"
@@ -61,6 +63,8 @@ class VCMFrameBuffer : public VCMEncodedFrame {
   int Tl0PicId() const;
   bool NonReference() const;
 
+  std::vector<NaluInfo> GetNaluInfos() const;
+
   void SetGofInfo(const GofInfoVP9& gof_info, size_t idx);
 
   // Increments a counter to keep track of the number of packets of this frame