libvpx: Pull from upstream

source/libvpx/vp9/decoder/vp9_decodeframe.h

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 
 #ifndef VP9_DECODER_VP9_DECODEFRAME_H_
 #define VP9_DECODER_VP9_DECODEFRAME_H_
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 struct VP9Common;
 struct VP9Decoder;
+struct vp9_read_bit_buffer;
 
 void vp9_init_dequantizer(struct VP9Common *cm);
 
 void vp9_decode_frame(struct VP9Decoder *pbi,
                       const uint8_t *data, const uint8_t *data_end,
                       const uint8_t **p_data_end);
 
+int vp9_read_sync_code(struct vp9_read_bit_buffer *const rb);
+void vp9_read_frame_size(struct vp9_read_bit_buffer *rb,
+                         int *width, int *height);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VP9_DECODER_VP9_DECODEFRAME_H_