Allow error of 3 (was 2) for scale by 8.

BUG=none
TEST=libyuvTest.ScaleDownBy8_Bilinear

Review URL: https://webrtc-codereview.appspot.com/3799004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@852 16f28f9a-4ce2-e073-06de-1de4eb20be90

README.chromium

 Name: libyuv
 URL: http://code.google.com/p/libyuv/
-Version: 851
+Version: 853
 License: BSD
 License File: LICENSE
 

include/libyuv/version.h

@@ -11,6 +11,6 @@
 #ifndef INCLUDE_LIBYUV_VERSION_H_  // NOLINT
 #define INCLUDE_LIBYUV_VERSION_H_
 
-#define LIBYUV_VERSION 851
+#define LIBYUV_VERSION 853
 
 #endif  // INCLUDE_LIBYUV_VERSION_H_  NOLINT

unit_test/scale_test.cc

@@ -145,9 +145,9 @@ static int TestFilter(int src_width, int src_height,
 // filtering is different fixed point implementations for SSSE3, Neon and C.
 #define TEST_FACTOR(name, hfactor, vfactor)                                    \
     TEST_FACTOR1(name, None, hfactor, vfactor, 0)                              \
-    TEST_FACTOR1(name, Linear, hfactor, vfactor, 2)                            \
-    TEST_FACTOR1(name, Bilinear, hfactor, vfactor, 2)                          \
-    TEST_FACTOR1(name, Box, hfactor, vfactor, 2)                               \
+    TEST_FACTOR1(name, Linear, hfactor, vfactor, 3)                            \
+    TEST_FACTOR1(name, Bilinear, hfactor, vfactor, 3)                          \
+    TEST_FACTOR1(name, Box, hfactor, vfactor, 3)                               \
 
 // TODO(fbarchard): ScaleDownBy1 should be lossless, but Box has error of 2.
 TEST_FACTOR(1, 1 / 1, 1 / 1)