Switch step for libyuvTest.TestFullYUV from 3 to 5 for better test performance.

BUG=397
TESTED=libyuvTest.TestFullYUV
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/37249004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1281 16f28f9a-4ce2-e073-06de-1de4eb20be90

unit_test/color_test.cc

@@ -301,7 +301,7 @@ TEST_F(libyuvTest, TestGreyYUV) {
 TEST_F(libyuvTest, TestFullYUV) {
   int i;
   // If using small image, step faster.
-  int step = benchmark_width_ <= 128 ? 3 : 1;
+  int step = benchmark_width_ <= 128 ? 5 : 1;
   int r0, g0, b0, r1, g1, b1;
   int rn[256] = { 0, }, gn[256] = { 0, },
       bn[256] = { 0, }, rx[256] = { 0, },