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sky authored
If a view has a ton of children (say > 5000) with the majority hidden then we spend a lot of unecessary time in View::UpdateRootBounds on every paint. BUG=409126 TEST=none, see bug R=luken@chromium.org Review URL: https://codereview.chromium.org/566403002 Cr-Commit-Position: refs/heads/master@{#294878}
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