Upstream chrome_cleaner/os subdir minus unit tests

The main changes were:
-converting LOG(INFO) to VLOG(1)
-Removing usages of Time::FromInternalValue

Bug: 830892
Change-Id: I117d6d605b5ca0b82ea7d509a127fbf316f483b0
Reviewed-on: https://chromium-review.googlesource.com/1130103
Commit-Queue: Chris Sharp <csharp@chromium.org>
Reviewed-by: proberge <proberge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574154}
61 files changed