Revert r97185 "Update libvpx snapshot to v0.9.7-p1 (Cayuga)."

libvpx/source/libvpx/vp8/encoder/variance_c.c

Index: libvpx/source/libvpx/vp8/encoder/variance_c.c
diff --git a/libvpx/source/libvpx/vp8/encoder/variance_c.c b/libvpx/source/libvpx/vp8/encoder/variance_c.c
index c7b9c22093646e35b11fd461bea30041b8ba5916..ede07c8db3bf877aa6a8cc8b9359b70c371d9647 100644
--- a/libvpx/source/libvpx/vp8/encoder/variance_c.c
+++ b/libvpx/source/libvpx/vp8/encoder/variance_c.c
@@ -61,6 +61,40 @@ static void variance(
     }
 }
 
+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,