Update image/mask_array_expected.pdf.0.png with one that's not cut off.

BUG=478164
R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1066563007
diff --git a/fx/image/mask_array_expected.pdf.0.png b/fx/image/mask_array_expected.pdf.0.png
index 6e6adbd..696a389 100644
--- a/fx/image/mask_array_expected.pdf.0.png
+++ b/fx/image/mask_array_expected.pdf.0.png
Binary files differ