Fix running unittests on iOS simulator

Fix running unittests on iOS simulator

WebRTC's unittest_main does not display anything on the screen of the device, so iOS would kill the application after 20 seconds because it's "frozen".
So a different 'main' function is used here, one that references test_support_ios.mm which displays a dummy label while tests run.

BUG=webrtc:7161

[oprypin_webrtc, 2017-06-01 16:25:47]

The CQ bit was checked by oprypin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-01 16:25:58]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-06-01 16:27:53]

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

[commit-bot: I haz the power, 2017-06-01 16:27:54]

Dry run: Try jobs failed on following builders:
  ios32_sim_ios9_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios32_sim_ios9_dbg/buil...)
  ios64_sim_ios10_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios64_sim_ios10_dbg/bui...)
  ios64_sim_ios9_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios64_sim_ios9_dbg/buil...)
  ios_arm64_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios_arm64_dbg/builds/20783)

[oprypin_webrtc, 2017-06-01 16:42:33]

The CQ bit was checked by oprypin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-01 16:42:37]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-06-01 16:43:47]

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

[commit-bot: I haz the power, 2017-06-01 16:43:48]

Dry run: Try jobs failed on following builders:
  ios64_sim_ios9_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios64_sim_ios9_dbg/buil...)
  ios_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios_dbg/builds/26098)
  ios_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios_rel/builds/25046)
  linux_libfuzzer_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_libfuzzer_rel/bui...)
  linux_more_configs on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_more_configs/buil...)
  mac_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_rel/builds/26166)
  presubmit on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/presubmit/builds/17694)

[oprypin_webrtc, 2017-06-01 16:49:28]

The CQ bit was checked by oprypin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-01 16:49:33]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-06-01 17:03:03]

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

[commit-bot: I haz the power, 2017-06-01 17:03:03]

Dry run: Try jobs failed on following builders:
  ios32_sim_ios9_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios32_sim_ios9_dbg/buil...)

[oprypin_webrtc, 2017-06-01 18:47:05]

Description was changed from

==========
Fix running unittests on iOS simulator

iOS would kill the application after 20 seconds if nothing is displayed on the
screen

BUG=webrtc:7161
==========

to

==========
Fix running unittests on iOS simulator

WebRTC's unittest_main does not display anything on the screen of the device, so
iOS would kill the application after 20 seconds because it's "frozen".
So a different 'main' function is used here, one that references
test_support_ios.mm which displays a dummy label while tests run.

BUG=webrtc:7161
==========

[oprypin_webrtc, 2017-06-02 09:30:46]

The CQ bit was checked by oprypin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-02 09:30:51]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-06-02 09:32:58]

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

[commit-bot: I haz the power, 2017-06-02 09:32:59]

Dry run: Try jobs failed on following builders:
  presubmit on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/presubmit/builds/17731)

[oprypin_webrtc, 2017-06-02 09:36:27]

The CQ bit was checked by oprypin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-02 09:36:38]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-06-02 10:15:28]

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

[commit-bot: I haz the power, 2017-06-02 10:15:28]

Dry run: Try jobs failed on following builders:
  ios64_sim_ios10_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios64_sim_ios10_dbg/bui...)

[oprypin_webrtc, 2017-06-03 11:57:28]

Swapping out the main function obviously removes support for the command line
flags that were defined in WebRTC's code. I hoped that it would be OK, but
apparently it isn't.
This will need more work.

[kthelgason, 2017-06-07 08:24:01]

On 2017/06/03 11:57:28, oprypin_webrtc wrote:
> Swapping out the main function obviously removes support for the command line
> flags that were defined in WebRTC's code. I hoped that it would be OK, but
> apparently it isn't.
> This will need more work.

I'm very glad you're making progress here. Perhaps there is another way to pass
the command line args, like ENV vars? LMK if I can help in any way.