add src-rect-constraint to drawImageRect

src/utils/SkLuaCanvas.cpp

Index: src/utils/SkLuaCanvas.cpp
diff --git a/src/utils/SkLuaCanvas.cpp b/src/utils/SkLuaCanvas.cpp
index 68094f2ca0e2344f49e43f4c66204b33436bbe29..e3adea55fefa9d4d43a80fb3e6f306a7c247dc66 100644
--- a/src/utils/SkLuaCanvas.cpp
+++ b/src/utils/SkLuaCanvas.cpp
@@ -238,7 +238,7 @@ void SkLuaCanvas::onDrawImage(const SkImage* image, SkScalar x, SkScalar y, cons
 }
 
 void SkLuaCanvas::onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst,
-                                  const SkPaint* paint) {
+                                  const SkPaint* paint SRC_RECT_CONSTRAINT_PARAM(constraint)) {
     AUTO_LUA("drawImageRect");
     if (paint) {
         lua.pushPaint(*paint, "paint");