Fix wpt/css/css-masking/mask-svg-content/mask-text-001.svg

The test has fixed dimensions of 100x100 pixels - the reference does
not. Add same fixed dimensions to the reference to get the same clipping
behavior.

Bug: 890755
Change-Id: Ib3d12ad1f7ace05027b81b9c683158490ae116ab
Reviewed-on: https://chromium-review.googlesource.com/1256568
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#595936}
2 files changed