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This reverts commit 71d76ec9.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 715997 as the
culprit for failures in the build cycles as shown on:
https://analysis.chromium.org/waterfall/culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyRAsSDVdmU3VzcGVjdGVkQ0wiMWNocm9taXVtLzcxZDc2ZWM5MTFhNDE1ZWM0ZjE5OTE4MzA0NzY2NGY0Yjg4NDgxZWEM

Sample Failed Build: https://ci.chromium.org/b/8896663695938427904

Sample Failed Step: unit_tests

Original change's description:
> Kill the software_reporter_tool process if the browser exits early
> 
> Assign the software_reporter_tool process to a job object with the
> KILL_ON_JOB_CLOSE flag, so that the process will automatically be killed
> if it's still running when the browser exits.
> 
> R=proberge
> 
> Bug: 1016939
> Change-Id: I87dfc907cc853add1721f80c589051896ed4e857
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1918106
> Commit-Queue: Joe Mason <joenotcharles@chromium.org>
> Reviewed-by: proberge <proberge@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#715997}


Change-Id: I98cf8ae8502f965ab438b7bfa47fe5be8b31ec48
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1016939
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1920319
Cr-Commit-Position: refs/heads/master@{#716005}