GitLab

UpdateMetricsUsagePrefs() is a chain of calls:
- ChromeDataUseMeasurement::UpdateDataUseToMetricsService()
  -> UpdateMetricsUsagePrefs()
  -> MetricsService::UpdateMetricsUsagePrefs()
  -> ReportingService::UpdateMetricsUsagePrefs()
  -> DataUseTracker::UpdateMetricsUsagePrefs()

It can be reduced to:
- ChromeDataUseMeasurement::UpdateDataUseToMetricsService()
  -> UpdateMetricsUsagePrefs()
  -> DataUseTracker::UpdateMetricsUsagePrefs()

This removes the dependency from ChromeDataUseMeasurement to
MetricsService and ReportingService.

Bug: 902791
Change-Id: I38a6d22d1ff823134c79bc342ea32be0f89cda77
Reviewed-on: https://chromium-review.googlesource.com/c/1334267
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: rajendrant <rajendrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608567}