Fix typo in layout test in rarely taken code branch

LayoutTests/svg/as-image/svg-as-image-intrinsic-size.html

Index: LayoutTests/svg/as-image/svg-as-image-intrinsic-size.html
diff --git a/LayoutTests/svg/as-image/svg-as-image-intrinsic-size.html b/LayoutTests/svg/as-image/svg-as-image-intrinsic-size.html
index 09d8a993b975ebde364315f256387b3667d92536..da28ae2f27aab99f0d8eb75d0e7111306f8a77e2 100644
--- a/LayoutTests/svg/as-image/svg-as-image-intrinsic-size.html
+++ b/LayoutTests/svg/as-image/svg-as-image-intrinsic-size.html
@@ -12,7 +12,7 @@
           assert_equals(img.height, 440);
           this.done();
       } else {
-          setTimeout(t.step_func(waitForComplete.bind(this, img, i + 1)), 1);
+          setTimeout(this.step_func(waitForComplete.bind(this, img, i + 1)), 1);
       }
   }