libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_reconintra.c

 /*
  *  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 351 matching lines @@
 
   // predict
   if (mode == DC_PRED) {
     dc_pred[left_available][up_available][tx_size](dst, dst_stride,
                                                    const_above_row, left_col);
   } else {
     pred[mode][tx_size](dst, dst_stride, const_above_row, left_col);
   }
 }
 
-void vp9_predict_intra_block(MACROBLOCKD *xd, int block_idx, int bwl_in,
+void vp9_predict_intra_block(const MACROBLOCKD *xd, int block_idx, int bwl_in,
                             TX_SIZE tx_size, int mode,
                             const uint8_t *ref, int ref_stride,
                             uint8_t *dst, int dst_stride) {
   const int bwl = bwl_in - tx_size;
   const int wmask = (1 << bwl) - 1;
   const int have_top = (block_idx >> bwl) || xd->up_available;
   const int have_left = (block_idx & wmask) || xd->left_available;
   const int have_right = ((block_idx & wmask) != wmask);
 
   assert(bwl >= 0);
   build_intra_predictors(ref, ref_stride, dst, dst_stride, mode, tx_size,
                          have_top, have_left, have_right);
 }