libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_variance.h

Index: source/libvpx/vp9/encoder/vp9_variance.h
diff --git a/source/libvpx/vp9/encoder/vp9_variance.h b/source/libvpx/vp9/encoder/vp9_variance.h
index 8fc47a85057391d668e82678ebd058a5a035d439..0a8739510f42a6b35d40260210d252bb479d39eb 100644
--- a/source/libvpx/vp9/encoder/vp9_variance.h
+++ b/source/libvpx/vp9/encoder/vp9_variance.h
@@ -18,60 +18,6 @@
 extern "C" {
 #endif
 
-// TODO(johannkoenig): All functions which depend on
-// [highbd_][8|10|12_]variance should be refactored or moved to vpx_dsp.
-static void variance(const uint8_t *a, int a_stride,
-                     const uint8_t *b, int b_stride,
-                     int  w, int  h, unsigned int *sse, int *sum) {
-  int i, j;
-
-  *sum = 0;
-  *sse = 0;
-
-  for (i = 0; i < h; i++) {
-    for (j = 0; j < w; j++) {
-      const int diff = a[j] - b[j];
-      *sum += diff;
-      *sse += diff * diff;
-    }
-
-    a += a_stride;
-    b += b_stride;
-  }
-}
-
-#if CONFIG_VP9_HIGHBITDEPTH
-static void highbd_variance64(const uint8_t *a8, int  a_stride,
-                              const uint8_t *b8, int  b_stride,
-                              int w, int h, uint64_t *sse, uint64_t *sum) {
-  int i, j;
-
-  uint16_t *a = CONVERT_TO_SHORTPTR(a8);
-  uint16_t *b = CONVERT_TO_SHORTPTR(b8);
-  *sum = 0;
-  *sse = 0;
-
-  for (i = 0; i < h; i++) {
-    for (j = 0; j < w; j++) {
-      const int diff = a[j] - b[j];
-      *sum += diff;
-      *sse += diff * diff;
-    }
-    a += a_stride;
-    b += b_stride;
-  }
-}
-static void highbd_8_variance(const uint8_t *a8, int a_stride,
-                              const uint8_t *b8, int b_stride,
-                              int w, int h, unsigned int *sse, int *sum) {
-  uint64_t sse_long = 0;
-  uint64_t sum_long = 0;
-  highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long);
-  *sse = (unsigned int)sse_long;
-  *sum = (int)sum_long;
-}
-#endif
-
 typedef unsigned int(*vp9_sad_fn_t)(const uint8_t *src_ptr,
                                     int source_stride,
                                     const uint8_t *ref_ptr,