Log the relative size of non-UKM data in uploaded reports
This patch adds the logging of the ratio X/Y where X is the size of serialized report with all UKM data omitted Y is the size of the serialized full report as a percentage to the UMA histogram UKM.ReportSize.NonUkmPercentage. This is to provide us an estimate on how much of the bandwidth usage is taken up by UKM data and non-UKM data. (Hopefully the non-UKM part is small enough and has negligible influence on overall bandwidth usage.) Change-Id: Ic73349e19736d326b3a585608afec07a855a2687 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2491423Reviewed-by:Robert Kaplow <rkaplow@chromium.org> Commit-Queue: Yue Ru Sun <yrsun@chromium.org> Cr-Commit-Position: refs/heads/master@{#821251}
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