libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_rd.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.
  */
 
@@ skipping 129 matching lines @@
 
 int vp9_get_switchable_rate(const struct VP9_COMP *cpi,
                             const MACROBLOCKD *const xd);
 
 int vp9_raster_block_offset(BLOCK_SIZE plane_bsize,
                             int raster_block, int stride);
 
 int16_t* vp9_raster_block_offset_int16(BLOCK_SIZE plane_bsize,
                                        int raster_block, int16_t *base);
 
-const YV12_BUFFER_CONFIG *vp9_get_scaled_ref_frame(const struct VP9_COMP *cpi,
-                                                   int ref_frame);
+YV12_BUFFER_CONFIG *vp9_get_scaled_ref_frame(const struct VP9_COMP *cpi,
+                                             int ref_frame);
 
 void vp9_init_me_luts();
 
 void vp9_get_entropy_contexts(BLOCK_SIZE bsize, TX_SIZE tx_size,
                               const struct macroblockd_plane *pd,
                               ENTROPY_CONTEXT t_above[16],
                               ENTROPY_CONTEXT t_left[16]);
 
 void vp9_set_rd_speed_thresholds(struct VP9_COMP *cpi);
 
@@ skipping 19 matching lines @@
                           const struct scale_factors *scale_uv);
 
 int vp9_get_intra_cost_penalty(int qindex, int qdelta,
                                vpx_bit_depth_t bit_depth);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VP9_ENCODER_VP9_RD_H_