Disable 'visual aid' in wpt/svg/painting/reftests/markers-orient-001.svg

The test has a red version of the reference painted under the actual
test content. Because of how alpha/coverage often work (at least in
software rasterizers), this can lead to the read bleeding through and
thus affecting the comparison with the reference image.
Disable the red reference shapes by adding a CSS rule. This way, if
someone feels it's useful for debugging they can easily re-enable it.

BUG=872697

Change-Id: Id47757c9dd112ead0db9c2dcd1adc74d5a52e55d
Reviewed-on: https://chromium-review.googlesource.com/1172622
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#582598}
1 file changed