Let GYP recognize the 'WDK_DIR' environment variable when generating ninja output on Windows.

Let GYP recognize the 'WDK_DIR' environment variable when generating ninja output on Windows.

TEST=Build chrome.exe using the compiler from Windows SDK 7.1

[alexeypa (please no reviews), 2012-05-08 20:51:02]

Please take a look. This CL makes GYP to recognize the WDK_DIR variable so it
become possible set include and lib paths via ~/.gyp/common.gypi (though still
in a somehow hacking way).

[alexeypa (please no reviews), 2012-05-08 20:51:37]

On 2012/05/08 20:51:02, alexeypa wrote:
> Please take a look. This CL makes GYP to recognize the WDK_DIR variable so it
> become possible set include and lib paths via ~/.gyp/common.gypi (though still
> in a somehow hacking way).

Forgot to mention. This is for VS Express and SDK-only setup.

[scottmg, 2012-05-08 20:54:26]

lgtm

https://chromiumcodereview.appspot.com/10377053/diff/1/pylib/gyp/msvs_emulati...
File pylib/gyp/msvs_emulation.py (right):

https://chromiumcodereview.appspot.com/10377053/diff/1/pylib/gyp/msvs_emulati...
pylib/gyp/msvs_emulation.py:138: # the WDK_DIR environment variable. Return None
if the location was not
Not returning anything, maybe just "... variable, may be None.

[alexeypa (please no reviews), 2012-05-08 20:58:25]

FYI.

https://chromiumcodereview.appspot.com/10377053/diff/1/pylib/gyp/msvs_emulati...
File pylib/gyp/msvs_emulation.py (right):

https://chromiumcodereview.appspot.com/10377053/diff/1/pylib/gyp/msvs_emulati...
pylib/gyp/msvs_emulation.py:138: # the WDK_DIR environment variable. Return None
if the location was not
On 2012/05/08 20:54:26, scottmg wrote:
> Not returning anything, maybe just "... variable, may be None.

Done.

[alexeypa (please no reviews), 2012-05-08 22:52:56]

Commited as r1369.