libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_subexp.h

 /*
  *  Copyright (c) 2013 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 15 matching lines @@
                                unsigned int *ct);
 
 int vp9_prob_diff_update_savings_search(const unsigned int *ct,
                                         vp9_prob oldp, vp9_prob *bestp,
                                         vp9_prob upd);
 
 
 int vp9_prob_diff_update_savings_search_model(const unsigned int *ct,
                                               const vp9_prob *oldp,
                                               vp9_prob *bestp,
-                                              vp9_prob upd,
-                                              int b, int r);
+                                              vp9_prob upd);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VP9_ENCODER_VP9_SUBEXP_H_