Restore depot_tools autoupdate in Windows.

Restore depot_tools autoupdate in Windows.

Original CL: https://codereview.chromium.org/1242013003/
The credit for this fix goes to bratell@opera.com.

Executing a bat file from another bat file will replace
that first bat file with the second one. To call the
second one and then return and execute the rest of the
first one, you have to do "call second.bat"

"python" is really "python.bat" so that this happened
was not obvious. More obvious now.

R=bratell@opera.com
TBR=pgervais@chromium.org
BUG=511926
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=296063

[Daniel Bratell, 2015-07-20 11:37:18]

lgtm (since it's the same as looked good to you), but I do not think my LGTM is
enough since I lack the committer bit. Maybe I should figure out how to get it,
but normally CQ takes care of things and it doesn't matter.

[Sergiy Byelozyorov, 2015-07-20 11:55:40]

Committed patchset #1 (id:1) manually as 296063 (presubmit successful).

[Sergiy Byelozyorov, 2015-07-20 11:56:13]

On 2015/07/20 11:37:18, Daniel Bratell wrote:
> lgtm (since it's the same as looked good to you), but I do not think my LGTM
is
> enough since I lack the committer bit. Maybe I should figure out how to get
it,
> but normally CQ takes care of things and it doesn't matter.

I am a committer, so I can land this manually (git cl land), but to avoid
skipping presubmit checks I need someone else's LGTM. If you want to become a
committer yourself, please follow the process descirbed at
https://www.chromium.org/getting-involved/become-a-committer. Thanks again for
fixing this.

[pgervais, 2015-07-21 01:38:44]

On 2015/07/20 11:56:13, Sergiy Byelozyorov wrote:
> On 2015/07/20 11:37:18, Daniel Bratell wrote:
> > lgtm (since it's the same as looked good to you), but I do not think my LGTM
> is
> > enough since I lack the committer bit. Maybe I should figure out how to get
> it,
> > but normally CQ takes care of things and it doesn't matter.
> 
> I am a committer, so I can land this manually (git cl land), but to avoid
> skipping presubmit checks I need someone else's LGTM. If you want to become a
> committer yourself, please follow the process descirbed at
> https://www.chromium.org/getting-involved/become-a-committer. Thanks again for
> fixing this.

lgtm