Revert of Revert of stop calling SkScalarDiv

include/core/SkMatrix.h

Index: include/core/SkMatrix.h
diff --git a/include/core/SkMatrix.h b/include/core/SkMatrix.h
index 89b3072f79e6bf97a6e7a9ca6c6012abb2473384..0252bc7101c423217093f1a7f281af71b792dfb5 100644
--- a/include/core/SkMatrix.h
+++ b/include/core/SkMatrix.h
@@ -28,7 +28,13 @@
         m.setScale(sx, sy);
         return m;
     }
-
+    
+    static SkMatrix SK_WARN_UNUSED_RESULT MakeScale(SkScalar scale) {
+        SkMatrix m;
+        m.setScale(scale, scale);
+        return m;
+    }
+    
     static SkMatrix SK_WARN_UNUSED_RESULT MakeTrans(SkScalar dx, SkScalar dy) {
         SkMatrix m;
         m.setTranslate(dx, dy);