libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_pickmode.h

 /*
  *  Copyright (c) 2014 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_ENCODER_VP9_PICKMODE_H_
 #define VP9_ENCODER_VP9_PICKMODE_H_
 
 #include "vp9/encoder/vp9_encoder.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+typedef struct {
+  uint8_t *data;
+  int stride;
+  int in_use;
+} PRED_BUFFER;
+
 int64_t vp9_pick_inter_mode(VP9_COMP *cpi, MACROBLOCK *x,
                             const struct TileInfo *const tile,
                             int mi_row, int mi_col,
                             int *returnrate,
                             int64_t *returndistortion,
                             BLOCK_SIZE bsize);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VP9_ENCODER_VP9_PICKMODE_H_