Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/vp8/encoder/variance_c.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 43 matching lines @@
             diff = src_ptr[j] - ref_ptr[j];
             *sum += diff;
             *sse += diff * diff;
         }
 
         src_ptr += source_stride;
         ref_ptr += recon_stride;
     }
 }
 
-unsigned int
-vp8_get8x8var_c
-(
-    const unsigned char *src_ptr,
-    int  source_stride,
-    const unsigned char *ref_ptr,
-    int  recon_stride,
-    unsigned int *SSE,
-    int *Sum
-)
-{
-
-    variance(src_ptr, source_stride, ref_ptr, recon_stride, 8, 8, SSE, Sum);
-    return (*SSE - (((*Sum) * (*Sum)) >> 6));
-}
-
-unsigned int
-vp8_get16x16var_c
-(
-    const unsigned char *src_ptr,
-    int  source_stride,
-    const unsigned char *ref_ptr,
-    int  recon_stride,
-    unsigned int *SSE,
-    int *Sum
-)
-{
-
-    variance(src_ptr, source_stride, ref_ptr, recon_stride, 16, 16, SSE, Sum);
-    return (*SSE - (((*Sum) * (*Sum)) >> 8));
-
-}
-
-
 
 unsigned int vp8_variance16x16_c(
     const unsigned char *src_ptr,
     int  source_stride,
     const unsigned char *ref_ptr,
     int  recon_stride,
     unsigned int *sse)
 {
     unsigned int var;
     int avg;
@@ skipping 375 matching lines @@
 
     HFilter = vp8_bilinear_filters[xoffset];
     VFilter = vp8_bilinear_filters[yoffset];
 
 
     var_filter_block2d_bil_first_pass(src_ptr, FData3, src_pixels_per_line, 1, 17, 8, HFilter);
     var_filter_block2d_bil_second_pass(FData3, temp2, 8, 8, 16, 8, VFilter);
 
     return vp8_variance8x16_c(temp2, 8, dst_ptr, dst_pixels_per_line, sse);
 }