Revert of Make gclient ready for the Blink (DEPS to main project) transition

Revert of Make gclient ready for the Blink (DEPS to main project) transition (patchset #6 id:180001 of https://codereview.chromium.org/743083002/)

Reason for revert:
The test intoruced is flake (see crrev.com/753543006/).
Need to look into that with more patience as it reproduces only on precise.


Original issue's description:
> Make gclient ready for the Blink (DEPS to main project) transition
> 
> This CL makes gclient understand correctly whether a git project is
> being moved from DEPS to an upper project and vice-versa.
> The driving use case for this is the upcoming Blink merge, where
> third_party/Webkit will be removed from DEPS (and .gitignore) and will 
> become part of the main project.
> 
> At present state, gclient leaves the .git folder around when a project
> is removed from DEPS, and that causes many problems. 
> 
> Furthermore this CL solves the performance problem of bisecting across
> the merge point. The subproject's (Blink) .git/ folder is moved to a
> backup location (in the main checkout root) and is restored when moving
> backwards, avoiding a re-fetch when bisecting across the merge point. 
> 
> BUG=431469
> 
> Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=293329

TBR=iannucci@chromium.org,maruel@chromium.org,jochen@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=431469
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=293352

[Primiano Tucci (use gerrit), 2014-12-11 17:22:37]

Created Revert of Make gclient ready for the Blink (DEPS to main project)
transition

[commit-bot: I haz the power, 2014-12-11 17:23:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/796053002/1

[commit-bot: I haz the power, 2014-12-11 17:25:30]

Committed patchset #1 (id:1) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=293352

[M-A Ruel, 2014-12-11 18:29:59]

lgtm

interestingly https://codereview.chromium.org/797523002/ committed just fine
(!?)

[Primiano Tucci (use gerrit), 2014-12-15 13:25:20]

On 2014/12/11 18:29:59, M-A Ruel wrote:
> lgtm
> 
> interestingly https://codereview.chromium.org/797523002/ committed just fine
> (!?)

Mumble. That should NOT have worked on precise (which has git 1.7).
I tried to repro locally on a 12.04 and with git 1.7 it systematically fails.
Can somebody confirm which git --version is run by the CQ?
I will start a thread on infra-dev soon about that.