Bugfix for cross-origin check

Bugfix for cross-origin check

The code is mistaking a missing reader for an error, but readers are now destroyed and re-created on demand.
Adding a new variable to explicitly track failures fixes the problem.

BUG=639690
Committed: https://crrev.com/5f8b274cdab547c8afff5429110a97d15353c19c
Cr-Commit-Position: refs/heads/master@{#414218}

[hubbe, 2016-08-24 17:38:24]

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

[hubbe, 2016-08-24 17:38:44]

hubbe@chromium.org changed reviewers:
+ dalecurtis@chromium.org

[commit-bot: I haz the power, 2016-08-24 17:38:47]

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

[DaleCurtis, 2016-08-24 17:40:18]

lgtm, unit test?

[hubbe, 2016-08-24 17:58:24]

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

[commit-bot: I haz the power, 2016-08-24 17:58:43]

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

[hubbe, 2016-08-24 18:05:19]

Test added.

[DaleCurtis, 2016-08-24 18:07:34]

lgtm

[hubbe, 2016-08-24 18:23:48]

The CQ bit was unchecked by hubbe@chromium.org

[hubbe, 2016-08-24 18:23:53]

The CQ bit was checked by hubbe@chromium.org

[commit-bot: I haz the power, 2016-08-24 18:24:31]

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, 2016-08-24 19:49:50]

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

[commit-bot: I haz the power, 2016-08-24 19:49:51]

Try jobs failed on following builders:
  linux_android_rel_ng on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/linux_androi...)

[hubbe, 2016-08-24 20:45:11]

The CQ bit was checked by hubbe@chromium.org

[commit-bot: I haz the power, 2016-08-24 20:46:19]

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, 2016-08-25 00:29:16]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-25 00:31:31]

Description was changed from

==========
Bugfix for cross-origin check

The code is mistaking a missing reader for an error, but readers are now
destroyed and re-created on demand.
Adding a new variable to explicitly track failures fixes the problem.

BUG=639690
==========

to

==========
Bugfix for cross-origin check

The code is mistaking a missing reader for an error, but readers are now
destroyed and re-created on demand.
Adding a new variable to explicitly track failures fixes the problem.

BUG=639690

Committed: https://crrev.com/5f8b274cdab547c8afff5429110a97d15353c19c
Cr-Commit-Position: refs/heads/master@{#414218}
==========

[commit-bot: I haz the power, 2016-08-25 00:31:32]

Patchset 2 (id:??) landed as
https://crrev.com/5f8b274cdab547c8afff5429110a97d15353c19c
Cr-Commit-Position: refs/heads/master@{#414218}