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This CL migrates ArcProcessService.

BUG=672829
TEST=Ran try.

Change-Id: Ia1b34a32eba2e8c3c069dcca9e89712e2e1396a2
Reviewed-on: https://chromium-review.googlesource.com/572445
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487175}