adjust suppression for handle leaks from HDCOffscreen::draw
adjust suppression for handle leaks from HDCOffscreen::draw

TBR=bungeman@chromium.org
BUG=346842
NOTRY=true

Review URL: https://codereview.chromium.org/1435023002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#359129}

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