Roll src/third_party/libvpx/source/libvpx/ f5bd76f5c..e66cd132f (23 commits).

third_party/libvpx/source/config/win/x64/vpx_dsp_rtcd.h

Index: third_party/libvpx/source/config/win/x64/vpx_dsp_rtcd.h
diff --git a/third_party/libvpx/source/config/win/x64/vpx_dsp_rtcd.h b/third_party/libvpx/source/config/win/x64/vpx_dsp_rtcd.h
index a39f1d470df3d9e5ee07f205281df5abaaede04e..493f32409f02d72f8dcb1c9e7ebc4caafdbf5842 100644
--- a/third_party/libvpx/source/config/win/x64/vpx_dsp_rtcd.h
+++ b/third_party/libvpx/source/config/win/x64/vpx_dsp_rtcd.h
@@ -993,18 +993,6 @@ unsigned int vpx_variance8x8_c(const uint8_t *src_ptr, int source_stride, const
 unsigned int vpx_variance8x8_sse2(const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse);
 #define vpx_variance8x8 vpx_variance8x8_sse2
 
-uint32_t vpx_variance_halfpixvar16x16_h_c(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
-uint32_t vpx_variance_halfpixvar16x16_h_sse2(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
-#define vpx_variance_halfpixvar16x16_h vpx_variance_halfpixvar16x16_h_sse2
-
-uint32_t vpx_variance_halfpixvar16x16_hv_c(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
-uint32_t vpx_variance_halfpixvar16x16_hv_sse2(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
-#define vpx_variance_halfpixvar16x16_hv vpx_variance_halfpixvar16x16_hv_sse2
-
-uint32_t vpx_variance_halfpixvar16x16_v_c(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
-uint32_t vpx_variance_halfpixvar16x16_v_sse2(const unsigned char *src_ptr, int source_stride, const unsigned char *ref_ptr, int  ref_stride, uint32_t *sse);
-#define vpx_variance_halfpixvar16x16_v vpx_variance_halfpixvar16x16_v_sse2
-
 void vpx_ve_predictor_4x4_c(uint8_t *dst, ptrdiff_t y_stride, const uint8_t *above, const uint8_t *left);
 #define vpx_ve_predictor_4x4 vpx_ve_predictor_4x4_c