Revert of Revert of stop calling SkScalarDiv (patchset #1 id:1 of https://codereview.chromium.org/1138263002/)

Reason for revert:
android patched, blink has rolled

Original issue's description:
> Revert of stop calling SkScalarDiv (patchset #4 id:60001 of https://codereview.chromium.org/1135053002/)
>
> Reason for revert:
> need to wait for Blink roll (and patch android)
>
> Original issue's description:
> > stop calling SkScalarDiv
> >
> > BUG=skia:
> > TBR=
> >
> > Committed: https://skia.googlesource.com/skia/+/67d71c898249a7af3523b16c6a69895a63bfae0a
>
> TBR=
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=skia:
>
> Committed: https://skia.googlesource.com/skia/+/2629697933b5cc975e45d2a45c48f803fc6cbcec

TBR=
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1135693003
diff --git a/bench/GradientBench.cpp b/bench/GradientBench.cpp
index f32c4ef..21b7370 100644
--- a/bench/GradientBench.cpp
+++ b/bench/GradientBench.cpp
@@ -101,8 +101,8 @@
 static SkShader* MakeConicalOutside(const SkPoint pts[2], const GradData& data,
                                     SkShader::TileMode tm, float scale) {
     SkPoint center0, center1;
-    SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10);
-    SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
+    SkScalar radius0 = (pts[1].fX - pts[0].fX) / 10;
+    SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
     center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
     center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
     return SkGradientShader::CreateTwoPointConical(center0, radius0,
@@ -115,8 +115,8 @@
 static SkShader* MakeConicalOutsideZeroRad(const SkPoint pts[2], const GradData& data,
                                            SkShader::TileMode tm, float scale) {
     SkPoint center0, center1;
-    SkScalar radius0 = SkScalarDiv(pts[1].fX - pts[0].fX, 10);
-    SkScalar radius1 = SkScalarDiv(pts[1].fX - pts[0].fX, 3);
+    SkScalar radius0 = (pts[1].fX - pts[0].fX) / 10;
+    SkScalar radius1 = (pts[1].fX - pts[0].fX) / 3;
     center0.set(pts[0].fX + radius0, pts[0].fY + radius0);
     center1.set(pts[1].fX - radius1, pts[1].fY - radius1);
     return SkGradientShader::CreateTwoPointConical(center0, 0.0,