Hide USB service unavailability from web content

Hide USB service unavailability from web content

This changes the handling of Mojo service connection errors so that they
are treated as if the service were present but returned no devices
instead of surfacing a specific failure message for this case.

This simplifies content_shell-based tests for WebUSB.

BUG=711443
Review-Url: https://codereview.chromium.org/2813903007
Cr-Commit-Position: refs/heads/master@{#464811}
Committed: https://chromium.googlesource.com/chromium/src/+/f809e180a16f5b87c3eb36101ffa342dc4e9bf0c

[Reilly Grant (use Gerrit), 2017-04-13 21:25:37]

reillyg@chromium.org changed reviewers:
+ rockot@chromium.org

[Reilly Grant (use Gerrit), 2017-04-13 21:25:37]

This is the change we discussed. PTAL.

[Ken Rockot(use gerrit already), 2017-04-13 21:28:18]

lgtm

[Reilly Grant (use Gerrit), 2017-04-13 21:31:35]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2017-04-13 21:32:00]

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, 2017-04-13 22:36:21]

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

[commit-bot: I haz the power, 2017-04-13 22:36:23]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Reilly Grant (use Gerrit), 2017-04-14 20:52:01]

Keep "No device selected." error text

[Reilly Grant (use Gerrit), 2017-04-14 20:53:28]

The CQ bit was checked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2017-04-14 20:53:29]

The patchset sent to the CQ was uploaded after l-g-t-m from rockot@chromium.org
Link to the patchset: https://codereview.chromium.org/2813903007/#ps20001
(title: "Keep "No device selected." error text")

[commit-bot: I haz the power, 2017-04-14 20:53:59]

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, 2017-04-14 22:31:43]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1492203208464990,
"parent_rev": "9b7e6eaa1d358c6fc2a90cbe15fdac410d5aa502", "commit_rev":
"f809e180a16f5b87c3eb36101ffa342dc4e9bf0c"}

[commit-bot: I haz the power, 2017-04-14 22:32:37]

Description was changed from

==========
Hide USB service unavailability from web content

This changes the handling of Mojo service connection errors so that they
are treated as if the service were present but returned no devices
instead of surfacing a specific failure message for this case.

This simplifies content_shell-based tests for WebUSB.

BUG=711443
==========

to

==========
Hide USB service unavailability from web content

This changes the handling of Mojo service connection errors so that they
are treated as if the service were present but returned no devices
instead of surfacing a specific failure message for this case.

This simplifies content_shell-based tests for WebUSB.

BUG=711443

Review-Url: https://codereview.chromium.org/2813903007
Cr-Commit-Position: refs/heads/master@{#464811}
Committed:
https://chromium.googlesource.com/chromium/src/+/f809e180a16f5b87c3eb36101ffa...
==========

[commit-bot: I haz the power, 2017-04-14 22:32:40]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/f809e180a16f5b87c3eb36101ffa...