MD Settings: Fix networking config errors

MD Settings: Fix networking config errors

This CL:
* Correctly handles errors from chrome when a guid becomes
  stale.
* Updates EAP properties in the networking_private IDl and
  in onc_spec.md.
* Fixes networking_private_chromeos.cc to not set empty
  proxy values.

BUG=714210, 710238
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2839693003
Cr-Commit-Position: refs/heads/master@{#467131}
(cherry picked from commit 382dc5ad70e096a8df3fea9c80e47e372bb04d00)

Review-Url: https://codereview.chromium.org/2843163002 .
Cr-Commit-Position: refs/branch-heads/3071@{#236}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/8d3d3844b0dd6cfb8a3a54d4a012fcbdf5268a59

[stevenjb, 2017-04-26 21:21:37]

Description was changed from

==========
MD Settings: Fix networking config errors

This CL:
* Correctly handles errors from chrome when a guid becomes
  stale.
* Updates EAP properties in the networking_private IDl and
  in onc_spec.md.
* Fixes networking_private_chromeos.cc to not set empty
  proxy values.

BUG=714210,710238
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2839693003
Cr-Commit-Position: refs/heads/master@{#467131}
(cherry picked from commit 382dc5ad70e096a8df3fea9c80e47e372bb04d00)
==========

to

==========
MD Settings: Fix networking config errors

This CL:
* Correctly handles errors from chrome when a guid becomes
  stale.
* Updates EAP properties in the networking_private IDl and
  in onc_spec.md.
* Fixes networking_private_chromeos.cc to not set empty
  proxy values.

BUG=714210,710238
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2839693003
Cr-Commit-Position: refs/heads/master@{#467131}
(cherry picked from commit 382dc5ad70e096a8df3fea9c80e47e372bb04d00)

Review-Url: https://codereview.chromium.org/2843163002 .
Cr-Commit-Position: refs/branch-heads/3071@{#236}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/8d3d3844b0dd6cfb8a3a54d4a012...
==========

[stevenjb, 2017-04-26 21:21:39]

Committed patchset #1 (id:1) manually as
8d3d3844b0dd6cfb8a3a54d4a012fcbdf5268a59.