Update Skia expectation for radial_shading_point_at_border.in

Pixel test radial_shading_point_at_border.in contains a radial shading
of which one of the control point has a radius of 0. This causes
rendering discrepancies between multiple rendering tools (See [1]).

Even though Skia rendering result is different from AGG's expectation,
it does align with rendering results from mac Preview and Okular. In
addition to that, it aligns with Acrobat when the first control
point's radius is extremely small. Therefore, we keep Skia's rendering
behavior as it is and update its expectation.

[1] https://bugs.chromium.org/p/pdfium/issues/detail?id=1310#c12

Bug: pdfium:1310
Change-Id: I9729f7806fd4a534c65df11845c63a6091709616
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/103231
Commit-Queue: Nigi <nigi@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/testing/SUPPRESSIONS b/testing/SUPPRESSIONS
index f022c38..6658fcc 100644
--- a/testing/SUPPRESSIONS
+++ b/testing/SUPPRESSIONS
@@ -524,9 +524,6 @@
 # TODO(pdfium:983289): Remove after associated bug is fixed
 bug_983289.in * * * agg
 
-# TODO(pdfium:1310): Remove after associated bug is fixed
-radial_shading_point_at_border.in * * * skia
-
 # TODO(chromium:1028991): Remove after associated bug is fixed
 reset_button.in * * * *
 
diff --git a/testing/resources/pixel/radial_shading_point_at_border_expected_skia.pdf.0.png b/testing/resources/pixel/radial_shading_point_at_border_expected_skia.pdf.0.png
new file mode 100644
index 0000000..92f2349
--- /dev/null
+++ b/testing/resources/pixel/radial_shading_point_at_border_expected_skia.pdf.0.png
Binary files differ