libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_idct.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 53 matching lines @@
 static const int sinpi_2_9 = 9929;
 static const int sinpi_3_9 = 13377;
 static const int sinpi_4_9 = 15212;
 
 static INLINE int dct_const_round_shift(int input) {
   int rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
   assert(INT16_MIN <= rv && rv <= INT16_MAX);
   return rv;
 }
 
-static INLINE int dct_32_round(int input) {
-  int rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
-  assert(-131072 <= rv && rv <= 131071);
-  return rv;
-}
-
 typedef void (*transform_1d)(int16_t*, int16_t*);
 
 typedef struct {
   transform_1d cols, rows;  // vertical and horizontal
 } transform_2d;
 
 #endif  // VP9_COMMON_VP9_IDCT_H_