Add PRESUBMIT check if modified UMA histogram name can be found
This Presubmit checks if some diffs affect any UMA_HISTOGRAM_*
macro and, if so, checks if the histogram name is to be found
in either tools/metrics/histograms/histograms.xml or in the
CL diffs.
Addresses the problem of someone modifying code and
inadvertently forgetting a corresponding histograms.xml
adaptation, that has happened in the past.
BUG=434420
Review URL: https://codereview.chromium.org/766713004
Cr-Commit-Position: refs/heads/master@{#306388}
2 files changed
