stop using SkScalarMul

BUG=skia:

Change-Id: Ie41d8665a1c62ba8eddc93d8cfefaf64ddc52ff8
Reviewed-on: https://skia-review.googlesource.com/8411
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/gm/lighting.cpp b/gm/lighting.cpp
index cd4132e..97c6f52 100644
--- a/gm/lighting.cpp
+++ b/gm/lighting.cpp
@@ -73,10 +73,8 @@
                                                 SkIntToScalar(10));
         SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
 
-        SkPoint3 distantDirection = SkPoint3::Make(SkScalarMul(cosAzimuth,
-                                                               SkScalarCos(elevationRad)),
-                                                   SkScalarMul(sinAzimuth,
-                                                               SkScalarCos(elevationRad)),
+        SkPoint3 distantDirection = SkPoint3::Make(cosAzimuth * SkScalarCos(elevationRad),
+                                                   sinAzimuth * SkScalarCos(elevationRad),
                                                    SkScalarSin(elevationRad));
         SkScalar cutoffAngle = SkIntToScalar(15);
         SkScalar kd = SkIntToScalar(2);