[Sheriff] Mark virtual/threaded/printing tests as needing rebaseline
[Sheriff] Mark virtual/threaded/printing tests as needing rebaseline

virtual/threaded/printing/forced-break-tree-dump-only.html
virtual/threaded/printing/page-count-relayout-shrink.html
Needs rebaseline

BUG=273306
NOTRY=true
TBR=pdr@chromium.org

Review URL: https://codereview.chromium.org/1848073002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#384415}

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