[iOS] Refactor iOS bots definitions.

[iOS] Refactor iOS bots definitions.

Refactor ios-{device,simulator}{,-gn}.json files so that the difference
between gyp and gn bot is limited to the "comment" and "mb_type" fields.

Sort "gn_args" values so in the same order as the corresponding value
in "GYP_DEFINES" (this make it easier to check that both gyp and gn are
using the same settings).

Convert ios-simulator-gn.json to build a fat binary and run the tests
on both a 32-bit and a 64-bit device as ios-simulator.json is doing.

BUG=621708
Committed: https://crrev.com/577c4f878e49796e3bcf397c9e97805829c3fb4b
Cr-Commit-Position: refs/heads/master@{#406869}

[sdefresne, 2016-07-20 13:38:56]

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

[commit-bot: I haz the power, 2016-07-20 13:39:09]

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

[sdefresne, 2016-07-20 13:39:33]

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

[sdefresne, 2016-07-20 13:39:34]

Please take a look.

[commit-bot: I haz the power, 2016-07-20 13:45:35]

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

[commit-bot: I haz the power, 2016-07-20 13:45:36]

Dry run: Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)

[Dirk Pranke, 2016-07-20 16:19:32]

lgtm

https://codereview.chromium.org/2162133003/diff/1/ios/build/bots/chromium.mac...
File ios/build/bots/chromium.mac/ios-device.json (right):

https://codereview.chromium.org/2162133003/diff/1/ios/build/bots/chromium.mac...
ios/build/bots/chromium.mac/ios-device.json:26: "target_cpu=\"arm\""
I think normally smut@ prefers to have the args sorted by name, but I can see
the rationale for doing things this way as well. Perhaps we can remember to sort
them once gyp is gone.

[sdefresne, 2016-07-21 15:32:20]

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

[sdefresne, 2016-07-21 15:32:30]

The CQ bit was checked by sdefresne@chromium.org

[sdefresne, 2016-07-21 15:32:30]

The patchset sent to the CQ was uploaded after l-g-t-m from dpranke@chromium.org
Link to the patchset: https://codereview.chromium.org/2162133003/#ps20001
(title: "Fix gyp bots.")

[commit-bot: I haz the power, 2016-07-21 15:32:35]

Dry run: 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, 2016-07-21 16:21:51]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-07-21 16:23:00]

Description was changed from

==========
[iOS] Refactor iOS bots definitions.

Refactor ios-{device,simulator}{,-gn}.json files so that the difference
between gyp and gn bot is limited to the "comment" and "mb_type" fields.

Sort "gn_args" values so in the same order as the corresponding value
in "GYP_DEFINES" (this make it easier to check that both gyp and gn are
using the same settings).

Convert ios-simulator-gn.json to build a fat binary and run the tests
on both a 32-bit and a 64-bit device as ios-simulator.json is doing.

BUG=621708
==========

to

==========
[iOS] Refactor iOS bots definitions.

Refactor ios-{device,simulator}{,-gn}.json files so that the difference
between gyp and gn bot is limited to the "comment" and "mb_type" fields.

Sort "gn_args" values so in the same order as the corresponding value
in "GYP_DEFINES" (this make it easier to check that both gyp and gn are
using the same settings).

Convert ios-simulator-gn.json to build a fat binary and run the tests
on both a 32-bit and a 64-bit device as ios-simulator.json is doing.

BUG=621708

Committed: https://crrev.com/577c4f878e49796e3bcf397c9e97805829c3fb4b
Cr-Commit-Position: refs/heads/master@{#406869}
==========

[commit-bot: I haz the power, 2016-07-21 16:23:01]

Patchset 2 (id:??) landed as
https://crrev.com/577c4f878e49796e3bcf397c9e97805829c3fb4b
Cr-Commit-Position: refs/heads/master@{#406869}