Remove compiler field from iOS bot configs, ensure gn_args match configuration

Remove compiler field from iOS bot configs, ensure gn_args match configuration

The configuration field will be removed next, so we need to ensure the is_debug gn_arg is set everywhere.

BUG=686304
Review-Url: https://codereview.chromium.org/2659123003
Cr-Commit-Position: refs/heads/master@{#447089}
Committed: https://chromium.googlesource.com/chromium/src/+/616850176d43488073a0b757f4330264c873dbc3

[smut, 2017-01-28 00:57:53]

smut@google.com changed reviewers:
+ dpranke@google.com

[Dirk Pranke, 2017-01-28 23:20:51]

dpranke@chromium.org changed reviewers:
+ dpranke@chromium.org

[Dirk Pranke, 2017-01-28 23:20:51]

lgtm

[smut, 2017-01-30 21:21:32]

The CQ bit was checked by smut@google.com

[commit-bot: I haz the power, 2017-01-30 21:22:33]

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, 2017-01-30 22:21:27]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485811292247850, "parent_rev":
"b97fb55f74f15f89fbfbe1716d4923cfb0488af5", "commit_rev":
"616850176d43488073a0b757f4330264c873dbc3"}

[commit-bot: I haz the power, 2017-01-30 22:22:05]

Description was changed from

==========
Remove compiler field from iOS bot configs, ensure gn_args match configuration

The configuration field will be removed next, so we need to ensure the is_debug
gn_arg is set everywhere.

BUG=686304
==========

to

==========
Remove compiler field from iOS bot configs, ensure gn_args match configuration

The configuration field will be removed next, so we need to ensure the is_debug
gn_arg is set everywhere.

BUG=686304

Review-Url: https://codereview.chromium.org/2659123003
Cr-Commit-Position: refs/heads/master@{#447089}
Committed:
https://chromium.googlesource.com/chromium/src/+/616850176d43488073a0b757f433...
==========

[commit-bot: I haz the power, 2017-01-30 22:22:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/616850176d43488073a0b757f433...