Include wifi_component only when in Win or Mac platforms.

Include wifi_component only when in Win or Mac platforms.

This issue was found while doing
https://codereview.chromium.org/243343002 and we discovered that android
was building wifi_test target.

It was building this target because it does:

$ ninja -C out/Debug -j50

And that builds all the targets generated by gyp.

Since the target was not excluded from android platform, a target was
created there and thus the above command would build it.

This patch fixes this problem, by only including it where it is actually
supported.

BUG=None
TEST=green trybots
R=mef@chromium.org,thestig@chromium.org
TBR=jochen@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=266025

[tfarina, 2014-04-24 03:24:38]

Lei, could you review my changes in chrome?
Mef, could you review everything, but specially the changes in components?

Thanks all in advance.

[Lei Zhang, 2014-04-24 03:30:11]

Will we have a Linux or ChromeOS implementation in the near future, or is it
going to stay Win/Mac only?

[mef, 2014-04-24 03:35:32]

On 2014/04/24 03:30:11, Lei Zhang wrote:
> Will we have a Linux or ChromeOS implementation in the near future, or is it
> going to stay Win/Mac only?

Win/Mac only. ChromeOS has different implementation elsewhere.

[mef, 2014-04-24 03:35:34]

On 2014/04/24 03:30:11, Lei Zhang wrote:
> Will we have a Linux or ChromeOS implementation in the near future, or is it
> going to stay Win/Mac only?

Win/Mac only. ChromeOS has different implementation elsewhere.

[Lei Zhang, 2014-04-24 03:36:47]

Then chrome/ lgtm

[mef, 2014-04-24 15:10:32]

components/ lgtm. Thanks for doing this!

[tfarina, 2014-04-24 15:52:54]

TBRing jochen for components/

[tfarina, 2014-04-24 15:53:10]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-04-24 15:54:29]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tfarina@chromium.org/259543002/1

[commit-bot: I haz the power, 2014-04-24 16:59:30]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-04-24 16:59:30]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_chromeos_rel

[tfarina, 2014-04-24 17:02:59]

The CQ bit was checked by tfarina@chromium.org

[commit-bot: I haz the power, 2014-04-24 17:05:02]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tfarina@chromium.org/259543002/1

[commit-bot: I haz the power, 2014-04-24 23:04:36]

Change committed as 266025