gyp: don't build gamepad_platform_data_fetcher_linux.cc when udev is disabled

gyp: don't build gamepad_platform_data_fetcher_linux.cc when udev is disabled

Fixup after https://codereview.chromium.org/2081583002

BUG=612330
Committed: https://crrev.com/3fd0432005a1a370ed273077aec593acd1aa963c
Cr-Commit-Position: refs/heads/master@{#404168}

[Mostyn Bramley-Moore, 2016-07-07 07:24:43]

The CQ bit was checked by mostynb@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-07-07 07:24:55]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Mostyn Bramley-Moore, 2016-07-07 07:25:27]

mostynb@opera.com changed reviewers:
+ bajones@chromium.org

[Mostyn Bramley-Moore, 2016-07-07 07:26:16]

@bajones: please take a look at this small fixup after
https://codereview.chromium.org/2081583002 - without this, non-udev linux gyp
builds fail.

[commit-bot: I haz the power, 2016-07-07 08:08:07]

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

[commit-bot: I haz the power, 2016-07-07 08:08:08]

Dry run: This issue passed the CQ dry run.

[bajones, 2016-07-07 15:33:05]

On 2016/07/07 08:08:08, commit-bot: I haz the power wrote:
> Dry run: This issue passed the CQ dry run.

Ah, thank you! I handled this case in gn but didn't realize I missed it with
gyp. LGTM!

[Mostyn Bramley-Moore, 2016-07-07 16:03:59]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2016-07-07 16:04:45]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-07 17:39:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-07 17:41:18]

Description was changed from

==========
gyp: don't build gamepad_platform_data_fetcher_linux.cc when udev is disabled

Fixup after https://codereview.chromium.org/2081583002

BUG=612330
==========

to

==========
gyp: don't build gamepad_platform_data_fetcher_linux.cc when udev is disabled

Fixup after https://codereview.chromium.org/2081583002

BUG=612330

Committed: https://crrev.com/3fd0432005a1a370ed273077aec593acd1aa963c
Cr-Commit-Position: refs/heads/master@{#404168}
==========

[commit-bot: I haz the power, 2016-07-07 17:41:19]

Patchset 1 (id:??) landed as
https://crrev.com/3fd0432005a1a370ed273077aec593acd1aa963c
Cr-Commit-Position: refs/heads/master@{#404168}