Define HAS_FEATURE instead of __has_feature

Define HAS_FEATURE instead of __has_feature

As discussed in: https://codereview.chromium.org/1837563002/

The approach is what's recommended by clang and is safe because __has_feature
was only defined if the compiler didn't provide it, but nonetheless it's good to
be consistent.

R=thakis@chromium.org

Committed: https://crrev.com/a8dc9dd8ca283435a6a312918f0526300c91e8de
Cr-Commit-Position: refs/heads/master@{#385541}

[JF, 2016-04-05 21:49:47]

The CQ bit was checked by jfb@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-04-05 21:50:28]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1866473002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1866473002/1

[commit-bot: I haz the power, 2016-04-05 23:39:25]

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

[commit-bot: I haz the power, 2016-04-05 23:39:25]

Dry run: This issue passed the CQ dry run.

[Nico, 2016-04-06 00:38:21]

thanks!

lgtm with the _mac file reverted

https://codereview.chromium.org/1866473002/diff/1/base/message_loop/message_p...
File base/message_loop/message_pump_mac.h (right):

https://codereview.chromium.org/1866473002/diff/1/base/message_loop/message_p...
base/message_loop/message_pump_mac.h:76: #if !defined(__OBJC__) ||
HAS_FEATURE(objc_arc)
on mac we only support clang, so not using the macro here is fine

[JF, 2016-04-06 16:42:53]

The CQ bit was checked by jfb@chromium.org

[JF, 2016-04-06 16:42:54]

The patchset sent to the CQ was uploaded after l-g-t-m from thakis@chromium.org
Link to the patchset: https://codereview.chromium.org/1866473002/#ps20001
(title: "Keep Mac as-is.")

[commit-bot: I haz the power, 2016-04-06 16:43:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1866473002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1866473002/20001

[commit-bot: I haz the power, 2016-04-06 20:20:42]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-04-06 20:22:11]

Description was changed from

==========
Define HAS_FEATURE instead of __has_feature

As discussed in: https://codereview.chromium.org/1837563002/

The approach is what's recommended by clang and is safe because __has_feature
was only defined if the compiler didn't provide it, but nonetheless it's good to
be consistent.

R=thakis@chromium.org
==========

to

==========
Define HAS_FEATURE instead of __has_feature

As discussed in: https://codereview.chromium.org/1837563002/

The approach is what's recommended by clang and is safe because __has_feature
was only defined if the compiler didn't provide it, but nonetheless it's good to
be consistent.

R=thakis@chromium.org

Committed: https://crrev.com/a8dc9dd8ca283435a6a312918f0526300c91e8de
Cr-Commit-Position: refs/heads/master@{#385541}
==========

[commit-bot: I haz the power, 2016-04-06 20:22:12]

Patchset 2 (id:??) landed as
https://crrev.com/a8dc9dd8ca283435a6a312918f0526300c91e8de
Cr-Commit-Position: refs/heads/master@{#385541}