Revert of Thorough tests for saturatedAdd and mulDiv255Round. (patchset #1 id:1 of https://codereview.chromium.org/1184113003/)

Reason for revert:
https://code.google.com/p/skia/issues/detail?id=3951

Original issue's description:
> Thorough tests for saturatedAdd and mulDiv255Round.
>
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/ce9d11189a5924b47c3629063b72bae9d466c2c7

TBR=fmalita@chromium.org,mtklein@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1177123004

1 files changed, 0 insertions, 36 deletions

diff --git a/tests/SkNxTest.cpp b/tests/SkNxTest.cpp
index eab625d41e..2463b46f08 100644
--- a/tests/SkNxTest.cpp
+++ b/tests/SkNxTest.cpp
@@ -5,7 +5,6 @@
  * found in the LICENSE file.
  */
 
-#include "Sk4px.h"
 #include "SkNx.h"
 #include "SkRandom.h"
 #include "Test.h"
@@ -155,38 +154,3 @@ DEF_TEST(SkNi_min, r) {
     }}
 #endif
 }
-
-DEF_TEST(SkNi_saturatedAdd, r) {
-    for (int a = 0; a < (1<<8); a++) {
-    for (int b = 0; b < (1<<8); b++) {
-        int exact = a+b;
-        if (exact > 255) { exact = 255; }
-        if (exact <   0) { exact =   0; }
-
-        REPORTER_ASSERT(r, Sk16b(a).saturatedAdd(Sk16b(b)).kth<0>() == exact);
-    }
-    }
-}
-
-DEF_TEST(Sk4px_muldiv255round, r) {
-    for (int a = 0; a < (1<<8); a++) {
-    for (int b = 0; b < (1<<8); b++) {
-        int exact = (a*b+127)/255;
-
-        // Duplicate a and b 16x each.
-        Sk4px av((SkAlpha)a),
-              bv((SkAlpha)b);
-
-        // This way should always be exactly correct.
-        int correct = av.mulWiden(bv).div255RoundNarrow().kth<0>();
-        REPORTER_ASSERT(r, correct == exact);
-
-        // We're a bit more flexible on this method: correct for 0 or 255, otherwise off by <=1.
-        int fast = av.fastMulDiv255Round(bv).kth<0>();
-        REPORTER_ASSERT(r, fast-exact >= -1 && fast-exact <= 1);
-        if (a == 0 || a == 255 || b == 0 || b == 255) {
-            REPORTER_ASSERT(r, fast == exact);
-        }
-    }
-    }
-}