Mojo EDK: Correctly handle EMSGSIZE on Mac.

Mojo EDK: Correctly handle EMSGSIZE on Mac.

As the comment copy-pasted from the IPC::ChannelPosix states, on Mac
EMSGSIZE may be returned when sending a message if there is insufficient
buffer space for transmitted FDs. Currently, the channel implementation
treats this as a fatal error; this CL changes it to a recoverable error.

This also re-enables NewlibPackagedAppTest.SuccessfulLoad, which was
failing on some bots due to this problem.

BUG=660582
Committed: https://crrev.com/12a7f40d299651beb746bf316b0c6c93fa8083d5
Cr-Commit-Position: refs/heads/master@{#434058}

[Sam McNally, 2016-11-16 23:54:20]

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

[commit-bot: I haz the power, 2016-11-16 23:55:32]

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, 2016-11-17 02:04:56]

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

[commit-bot: I haz the power, 2016-11-17 02:04:59]

Dry run: Try jobs failed on following builders:
  linux_chromium_chromeos_ozone_rel_ng on master.tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Sam McNally, 2016-11-17 02:53:55]

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

[commit-bot: I haz the power, 2016-11-17 02:55:02]

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, 2016-11-17 03:50:48]

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

[commit-bot: I haz the power, 2016-11-17 03:50:49]

Dry run: Try jobs failed on following builders:
  cast_shell_android on master.tryserver.chromium.android (JOB_TIMED_OUT, no
build URL)

[Sam McNally, 2016-11-17 04:29:11]

sammc@chromium.org changed reviewers:
+ raymes@chromium.org, rockot@chromium.org

[Sam McNally, 2016-11-17 04:29:11]

+rockot for //mojo

+raymes for //chrome/test/ppapi

[Sam McNally, 2016-11-17 06:55:56]

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

[commit-bot: I haz the power, 2016-11-17 06:56:15]

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, 2016-11-17 07:19:40]

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

[commit-bot: I haz the power, 2016-11-17 07:19:41]

Dry run: This issue passed the CQ dry run.

[raymes, 2016-11-20 23:21:36]

lgtm

[Sam McNally, 2016-11-22 22:47:27]

rockot: ping

[Ken Rockot(use gerrit already), 2016-11-22 22:49:50]

lgtm

[Sam McNally, 2016-11-22 22:59:27]

The CQ bit was checked by sammc@chromium.org

[commit-bot: I haz the power, 2016-11-22 23:00:26]

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, 2016-11-23 01:09:57]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1479855567976720, "parent_rev":
"3233c1ebc37e01a9edf3431a61e971cf10367709", "commit_rev":
"c31a11d2d3d0a33d5ec182771a1af50695e71d29"}

[commit-bot: I haz the power, 2016-11-23 01:10:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-23 01:14:34]

Description was changed from

==========
Mojo EDK: Correctly handle EMSGSIZE on Mac.

As the comment copy-pasted from the IPC::ChannelPosix states, on Mac
EMSGSIZE may be returned when sending a message if there is insufficient
buffer space for transmitted FDs. Currently, the channel implementation
treats this as a fatal error; this CL changes it to a recoverable error.

This also re-enables NewlibPackagedAppTest.SuccessfulLoad, which was
failing on some bots due to this problem.

BUG=660582
==========

to

==========
Mojo EDK: Correctly handle EMSGSIZE on Mac.

As the comment copy-pasted from the IPC::ChannelPosix states, on Mac
EMSGSIZE may be returned when sending a message if there is insufficient
buffer space for transmitted FDs. Currently, the channel implementation
treats this as a fatal error; this CL changes it to a recoverable error.

This also re-enables NewlibPackagedAppTest.SuccessfulLoad, which was
failing on some bots due to this problem.

BUG=660582

Committed: https://crrev.com/12a7f40d299651beb746bf316b0c6c93fa8083d5
Cr-Commit-Position: refs/heads/master@{#434058}
==========

[commit-bot: I haz the power, 2016-11-23 01:14:35]

Patchset 1 (id:??) landed as
https://crrev.com/12a7f40d299651beb746bf316b0c6c93fa8083d5
Cr-Commit-Position: refs/heads/master@{#434058}