Revert of Revert of stop calling SkScalarDiv

src/utils/SkInterpolator.cpp

Index: src/utils/SkInterpolator.cpp
diff --git a/src/utils/SkInterpolator.cpp b/src/utils/SkInterpolator.cpp
index 97574e475b4ed791702cd688cd7e35672a5b06e2..03e7e4a83f9d230f60bf5b934601648dfb20ae04 100644
--- a/src/utils/SkInterpolator.cpp
+++ b/src/utils/SkInterpolator.cpp
@@ -62,8 +62,7 @@
                                   SkMSec nextTime, const SkScalar blend[4]) {
     SkASSERT(time > prevTime && time < nextTime);
 
-    SkScalar t = SkScalarDiv((SkScalar)(time - prevTime),
-                             (SkScalar)(nextTime - prevTime));
+    SkScalar t = (SkScalar)(time - prevTime) / (SkScalar)(nextTime - prevTime);
     return blend ?
             SkUnitCubicInterp(t, blend[0], blend[1], blend[2], blend[3]) : t;
 }