fix warning compiling allocator/tcmalloc on win32

fix warning compiling allocator/tcmalloc on win32

..\..\third_party\tcmalloc\chromium\src\windows\port.cc(38) : warning C4005: 'NOMINMAX' : macro redefinition
        command-line arguments :  see previous definition of 'NOMINMAX'

R=jar@chromium.org
BUG=126483
NOTRY=true

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=138274

[jar (doing other things), 2012-05-21 22:27:39]

lgtm

[commit-bot: I haz the power, 2012-05-21 22:31:14]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/scottmg@chromium.org/10413034/1

[commit-bot: I haz the power, 2012-05-22 03:51:18]

Try job failure for 10413034-1 (retry) (retry) on win_rel for steps
"base_unittests, sync_unit_tests" (clobber build).
It's a second try, previously, steps "base_unittests, sync_unit_tests" failed.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2012-05-22 16:38:32]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/scottmg@chromium.org/10413034/1

[commit-bot: I haz the power, 2012-05-22 16:40:06]

Change committed as 138274