libvpx: Pull from upstream

source/libvpx/test/md5_helper.h

 /*
  *  Copyright (c) 2012 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 24 matching lines @@
       const int w = (plane ? (img->d_w + img->x_chroma_shift) >>
                      img->x_chroma_shift : img->d_w) * bytes_per_sample;
 
       for (int y = 0; y < h; ++y) {
         MD5Update(&md5_, buf, w);
         buf += img->stride[plane];
       }
     }
   }
 
+  void Add(const uint8_t *data, size_t size) {
+    MD5Update(&md5_, data, static_cast<uint32_t>(size));
+  }
+
   const char *Get(void) {
     static const char hex[16] = {
       '0', '1', '2', '3', '4', '5', '6', '7',
       '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
     };
     uint8_t tmp[16];
     MD5Context ctx_tmp = md5_;
 
     MD5Final(tmp, &ctx_tmp);
     for (int i = 0; i < 16; i++) {
       res_[i * 2 + 0]  = hex[tmp[i] >> 4];
       res_[i * 2 + 1]  = hex[tmp[i] & 0xf];
     }
     res_[32] = 0;
 
     return res_;
   }
 
  protected:
   char res_[33];
   MD5Context md5_;
 };
 
 }  // namespace libvpx_test
 
 #endif  // TEST_MD5_HELPER_H_