Revert of Iteratively increase sample size for good/bad classification.

Revert of Iteratively increase sample size for good/bad classification. (patchset #12 id:220001 of https://codereview.chromium.org/1610203003/ )

Reason for revert:
return_code bisects fail with this approach

Original issue's description:
> Iteratively increase sample size for good/bad classification.
> 
> This change makes the bisect recipe use scipy's implementation of
> Mann-Whitney's U test to determine if a significant different exists
> between two given revisions.
> 
> It also changes the bisection step by requiring more tests to be run
> when the sample is insufficient to establish a difference between the
> revision being evaluated and either of the FKBR/LKGR.
> 
> R=dtu,qyearsley,prasadv
> BUG=565606
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298810

TBR=dtu@chromium.org,prasadv@chromium.org,qyearsley@chromium.org,vadimsh@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=565606
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298811

[RobertoCN, 2016-02-16 19:48:16]

Created Revert of Iteratively increase sample size for good/bad classification.

[commit-bot: I haz the power, 2016-02-16 19:48:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1702013004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1702013004/1

[commit-bot: I haz the power, 2016-02-16 19:48:40]

Description was changed from

==========
Revert of Iteratively increase sample size for good/bad classification.
(patchset #12 id:220001 of https://codereview.chromium.org/1610203003/ )

Reason for revert:
return_code bisects fail with this approach

Original issue's description:
> Iteratively increase sample size for good/bad classification.
> 
> This change makes the bisect recipe use scipy's implementation of
> Mann-Whitney's U test to determine if a significant different exists
> between two given revisions.
> 
> It also changes the bisection step by requiring more tests to be run
> when the sample is insufficient to establish a difference between the
> revision being evaluated and either of the FKBR/LKGR.
> 
> R=dtu,qyearsley,prasadv
> BUG=565606
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298810

TBR=dtu@chromium.org,prasadv@chromium.org,qyearsley@chromium.org,vadimsh@chro...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=565606
==========

to

==========
Revert of Iteratively increase sample size for good/bad classification.
(patchset #12 id:220001 of https://codereview.chromium.org/1610203003/ )

Reason for revert:
return_code bisects fail with this approach

Original issue's description:
> Iteratively increase sample size for good/bad classification.
> 
> This change makes the bisect recipe use scipy's implementation of
> Mann-Whitney's U test to determine if a significant different exists
> between two given revisions.
> 
> It also changes the bisection step by requiring more tests to be run
> when the sample is insufficient to establish a difference between the
> revision being evaluated and either of the FKBR/LKGR.
> 
> R=dtu,qyearsley,prasadv
> BUG=565606
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298810

TBR=dtu@chromium.org,prasadv@chromium.org,qyearsley@chromium.org,vadimsh@chro...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=565606

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=298811
==========

[commit-bot: I haz the power, 2016-02-16 19:48:41]

Committed patchset #1 (id:1) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=298811