Fixes for python 2.7.5 support.

Fixes for python 2.7.5 support.

Fix the git-* wrapper scripts, PRESUBMIT.py and .gitignore.

The previous python wrapping scripts assumed python_bin\python.exe. This CL
modifies the wrapping scripts to use python.bat. This requires some quoting
magic and explicitly defer to cmd.exe.

This may break some cases where double quotes are used as arguments. We can't do
miracles on Windows.

R=iannucci@chromium.org
BUG=

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=231888

[M-A Ruel, 2013-10-29 20:29:48]

Tested on both cmd.exe and cygwin.
Used https://code.google.com/p/msysgit/issues/detail?id=426 as an inspiration. I
know the quoting is not perfect but that's the best way to get around the bat
file.

[iannucci1, 2013-10-30 08:28:40]

On 2013/10/29 20:29:48, M-A Ruel wrote:
> Tested on both cmd.exe and cygwin.
> Used https://code.google.com/p/msysgit/issues/detail?id=426 as an inspiration.
I
> know the quoting is not perfect but that's the best way to get around the bat
> file.

Won't this introduce yet another process in the process tree for windows? It's
getting pretty deep... :-\

[M-A Ruel, 2013-10-30 13:05:01]

On 2013/10/30 08:28:40, iannucci1 wrote:
> On 2013/10/29 20:29:48, M-A Ruel wrote:
> > Tested on both cmd.exe and cygwin.
> > Used https://code.google.com/p/msysgit/issues/detail?id=426 as an
inspiration.
> I
> > know the quoting is not perfect but that's the best way to get around the
bat
> > file.
> 
> Won't this introduce yet another process in the process tree for windows? It's
> getting pretty deep... :-\

It's only at the top of the call tree, the slowdown is not visible at this
point.

[M-A Ruel, 2013-10-30 13:05:25]

On 2013/10/30 13:05:01, M-A Ruel wrote:
> On 2013/10/30 08:28:40, iannucci1 wrote:
> > Won't this introduce yet another process in the process tree for windows?
It's
> > getting pretty deep... :-\
> 
> It's only at the top of the call tree, the slowdown is not visible at this
> point.

Well, if you have a better idea, I'll all hears. At the moment, it is blocking
the 2.7.5 rollout.

[iannucci, 2013-10-30 18:48:21]

On 2013/10/30 13:05:25, M-A Ruel wrote:
> On 2013/10/30 13:05:01, M-A Ruel wrote:
> > On 2013/10/30 08:28:40, iannucci1 wrote:
> > > Won't this introduce yet another process in the process tree for windows?
> It's
> > > getting pretty deep... :-\
> > 
> > It's only at the top of the call tree, the slowdown is not visible at this
> > point.
> 
> Well, if you have a better idea, I'll all hears. At the moment, it is blocking
> the 2.7.5 rollout.

Oh, d'oh! I thought I hit the lgtm button!

[commit-bot: I haz the power, 2013-10-30 19:01:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/50563008/1

[commit-bot: I haz the power, 2013-10-30 19:04:03]

Change committed as 231888

[M-A Ruel, 2013-10-30 20:04:32]

On 2013/10/30 19:04:03, I haz the power (commit-bot) wrote:
> Change committed as 231888

Forgot to mention, it was for http://crbug.com/241769.