Gardening: update test expectations.
Gardening: update test expectations.

virtual/slimmingpaint/fast/borders/border-image-side-reduction.html [ XP ]

BUG=448442
TBR=morrita@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/854403002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@188596 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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