Revert of Add a library for running external commands, providing timeouts and test injection.

Revert of Add a library for running external commands, providing timeouts and test injection. (patchset #2 id:40001 of https://codereview.chromium.org/1290913004/ )

Reason for revert:
CT Chromium Perf tasks are failing with:

E0815 11:07:22.649344   13091 exec.go:193] Command exited with invalid argument: python /b/skia-repo/go/src/go.skia.org/infra/ct/py/sync_skia_in_chrome.py --destination=/b/storage/chromium_builds/linux_base --fetch_target=chromium --chrome_revision=6ae54795f6d077e31f4fb42540ead46f4141f2bb --skia_revision=fb28cd2b13d76c324570341e1155aaadc1b532b6

Original issue's description:
> Add a library for running external commands, providing timeouts and test injection.
> 
> BUG=skia:4106
> 
> Committed: https://skia.googlesource.com/buildbot/+/b65fde6749a3e060938cd280c7e281e29516edc1

TBR=jcgregorio@google.com,benjaminwagner@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4106
Committed: https://skia.googlesource.com/buildbot/+/ac6c1292955c888d35f6c01cf97d3b6ff4029424

[rmistry, 2015-08-15 18:08:07]

Created Revert of Add a library for running external commands, providing
timeouts and test injection.

[commit-bot: I haz the power, 2015-08-15 18:08:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1295043002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1295043002/1

[commit-bot: I haz the power, 2015-08-15 18:08:26]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/buildbot/+/ac6c1292955c888d35f6c01cf97d3b6ff402...

[dogben, 2015-08-17 21:35:48]

On 2015/08/15 18:08:07, rmistry wrote:
> Created Revert of Add a library for running external commands, providing
> timeouts and test injection.

Sorry for the breakage.

I am unable to reproduce this error on my desktop. I will try to reproduce on
build101-m5 tomorrow, in case the version of Ubuntu (12.04.5 vs 14.04.3 on my
machine) or Go (1.4 vs 1.4.2 on my machine) is causing different behavior.

A couple questions:
1. Does run_chromium_perf_on_workers/appengine_poller run in a chroot?
2. Are there any environment variables I should set/unset to match the
environment that appengine_poller runs in? What is the PATH?

[rmistry, 2015-08-17 23:29:45]

On 2015/08/17 21:35:48, Ben Wagner wrote:
> On 2015/08/15 18:08:07, rmistry wrote:
> > Created Revert of Add a library for running external commands, providing
> > timeouts and test injection.
> 
> Sorry for the breakage.
> 
> I am unable to reproduce this error on my desktop. I will try to reproduce on
> build101-m5 tomorrow, in case the version of Ubuntu (12.04.5 vs 14.04.3 on my
> machine) or Go (1.4 vs 1.4.2 on my machine) is causing different behavior.
> 
> A couple questions:
> 1. Does run_chromium_perf_on_workers/appengine_poller run in a chroot?

No, it runs in the same directory as appengine_poller.py

> 2. Are there any environment variables I should set/unset to match the
> environment that appengine_poller runs in? What is the PATH?

The way to ssh into build101-m5 as chromebot is the method described in
https://docs.google.com/document/d/1hNkfkXaDgiQJbrcK1Iv1l3rzAlE_0xa7Ki9UGYgrq....
It will also provide you the PATH env var that is used.

[dogben, 2015-08-18 20:05:26]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1302513006/ by benjaminwagner@google.com.

The reason for reverting is: Creating new issue to reland..