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This removes the dependency ChromeDataUseMeasurement has on
g_browser_process (when kNetworkService is enabled) and fixes a
crash when starting in service-manager-only mode.

Bug: 902791
Change-Id: I0ed11f4735f4494247a7c17767b53aab695d0f14
Reviewed-on: https://chromium-review.googlesource.com/c/1334334Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Reviewed-by: Min Qin <qinmin@chromium.org>
Reviewed-by: rajendrant <rajendrant@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612421}