Convert Vp8 Rtp headers to frame references.

webrtc/modules/video_coding/frame_object.cc

Index: webrtc/modules/video_coding/frame_object.cc
diff --git a/webrtc/modules/video_coding/frame_object.cc b/webrtc/modules/video_coding/frame_object.cc
index 363c8a7035738d1f1e62beaf82313f729cb99b6c..a8119dfed227b177d8e9420740c1b4d09dcdc4f2 100644
--- a/webrtc/modules/video_coding/frame_object.cc
+++ b/webrtc/modules/video_coding/frame_object.cc
@@ -16,7 +16,6 @@ namespace webrtc {
 namespace video_coding {
 
 RtpFrameObject::RtpFrameObject(PacketBuffer* packet_buffer,
-                               uint16_t picture_id,
                                uint16_t first_packet,
                                uint16_t last_packet)
     : packet_buffer_(packet_buffer),
@@ -35,10 +34,6 @@ uint16_t RtpFrameObject::last_packet() const {
   return last_packet_;
 }
 
-uint16_t RtpFrameObject::picture_id() const {
-  return picture_id_;
-}
-
 bool RtpFrameObject::GetBitstream(uint8_t* destination) const {
   return packet_buffer_->GetBitstream(*this, destination);
 }