simplify the is_desktop_linux default value expression

simplify the is_desktop_linux default value expression

Let's remove the redundant '&& current_is != "chromeos"' part of the
is_desktop_linux default value expression.

BUG=554006
Committed: https://crrev.com/3e37ae536e06a91ce60869496db2b9b17f02c70a
Cr-Commit-Position: refs/heads/master@{#358946}

[Mostyn Bramley-Moore, 2015-11-10 19:21:39]

Description was changed from

==========
simplify the is_desktop_linux default
==========

to

==========
simplify the is_desktop_linux default value expression

Let's remove the redundant '&& current_is != "chromeos"' part of the 
is_desktop_linux default value expression.

BUG=554006
==========

[Mostyn Bramley-Moore, 2015-11-10 19:22:56]

mostynb@opera.com changed reviewers:
+ brettw@chromium.org, smcgruer@google.com

[Mostyn Bramley-Moore, 2015-11-10 19:22:56]

@brettw: can you please rubber-stamp this?  (Is the description OK?)

[brettw, 2015-11-10 21:40:49]

lgtm

[Mostyn Bramley-Moore, 2015-11-10 22:14:59]

The CQ bit was checked by mostynb@opera.com

[commit-bot: I haz the power, 2015-11-10 22:15:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1433033002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1433033002/1

[commit-bot: I haz the power, 2015-11-10 23:16:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-10 23:17:30]

Patchset 1 (id:??) landed as
https://crrev.com/3e37ae536e06a91ce60869496db2b9b17f02c70a
Cr-Commit-Position: refs/heads/master@{#358946}