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This reverts commit a061c829.

Reason for revert: Suspect in crbug.com/906242

Original change's description:
> Flatten UpdateMetricsUsagePrefs - skip Metrics and Reporting service.
> 
> 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}

TBR=asvitkine@chromium.org,bcwhite@chromium.org,rajendrant@chromium.org,hnakashima@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 902791
Change-Id: Iad1f49a8bae42e60ae5a9c68509d4cb38db683ef
Reviewed-on: https://chromium-review.googlesource.com/c/1344817Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609861}