Add missing onDrawDrawable() overrides to utility canvases

Change-Id: Ia5a7c523263e2c4744e0f3a743c6a4433760a4be
Reviewed-on: https://skia-review.googlesource.com/49770
Reviewed-by: Stan Iliev <stani@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
diff --git a/include/utils/SkLuaCanvas.h b/include/utils/SkLuaCanvas.h
index 7653b45..2fef2c0 100644
--- a/include/utils/SkLuaCanvas.h
+++ b/include/utils/SkLuaCanvas.h
@@ -66,6 +66,7 @@
     void onClipRegion(const SkRegion&, SkClipOp) override;
 
     void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
+    void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
 
 private:
     lua_State*  fL;