Change signature of SkSpecialImage::draw to take SkScalars

Review URL: https://codereview.chromium.org/1704603002
diff --git a/tests/SpecialImageTest.cpp b/tests/SpecialImageTest.cpp
index 3ae8d33..bc770a0 100644
--- a/tests/SpecialImageTest.cpp
+++ b/tests/SpecialImageTest.cpp
@@ -88,7 +88,7 @@
     SkCanvas* canvas = surf->getCanvas();
 
     canvas->clear(SK_ColorBLUE);
-    img->draw(canvas, kPad, kPad, nullptr);
+    img->draw(canvas, SkIntToScalar(kPad), SkIntToScalar(kPad), nullptr);
 
     SkBitmap bm;
     bm.allocN32Pixels(kFullSize, kFullSize, true);