Fix base::Callback<>::IsCancelled handling on nested base::Callback

Fix base::Callback<>::IsCancelled handling on nested base::Callback

Previous implementation of IsCancelled doesn't have a specialization for
nested OnceCallback. That implies OnceCallback::IsCancelled returns false
when it's a nested callback and the inner callback is a cancelled OnceCallback.

Committed: https://crrev.com/44adf07a8104da5e1ff35b9f57e30ad050d5f301
Cr-Commit-Position: refs/heads/master@{#423796}

[tzik, 2016-10-06 13:50:49]

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

[commit-bot: I haz the power, 2016-10-06 13:51:04]

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

[tzik, 2016-10-06 13:51:06]

Description was changed from

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback

BUG=
==========

to

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback
==========

[tzik, 2016-10-06 13:51:06]

tzik@chromium.org changed reviewers:
+ yutak@chromium.org

[tzik, 2016-10-06 13:54:00]

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

[commit-bot: I haz the power, 2016-10-06 13:54:04]

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

[tzik, 2016-10-06 13:59:28]

Description was changed from

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback
==========

to

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback

Previous implementation of IsCancelled doesn't have a specialization for
nested OnceCallback. That implies OnceCallback::IsCancelled returns false
when it's a nested callback and the inner callback is a cancelled OnceCallback.
==========

[tzik, 2016-10-06 13:59:38]

PTAL

[commit-bot: I haz the power, 2016-10-06 14:54:30]

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

[commit-bot: I haz the power, 2016-10-06 14:54:31]

Dry run: 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...)

[Yuta Kitamura, 2016-10-07 02:34:15]

LGTM, wow this bug is nasty.

[tzik, 2016-10-07 02:36:08]

The CQ bit was checked by tzik@chromium.org

[commit-bot: I haz the power, 2016-10-07 02:36:21]

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, 2016-10-07 04:35:13]

Description was changed from

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback

Previous implementation of IsCancelled doesn't have a specialization for
nested OnceCallback. That implies OnceCallback::IsCancelled returns false
when it's a nested callback and the inner callback is a cancelled OnceCallback.
==========

to

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback

Previous implementation of IsCancelled doesn't have a specialization for
nested OnceCallback. That implies OnceCallback::IsCancelled returns false
when it's a nested callback and the inner callback is a cancelled OnceCallback.
==========

[commit-bot: I haz the power, 2016-10-07 04:35:14]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-10-07 04:37:17]

Description was changed from

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback

Previous implementation of IsCancelled doesn't have a specialization for
nested OnceCallback. That implies OnceCallback::IsCancelled returns false
when it's a nested callback and the inner callback is a cancelled OnceCallback.
==========

to

==========
Fix base::Callback<>::IsCancelled handling on nested base::Callback

Previous implementation of IsCancelled doesn't have a specialization for
nested OnceCallback. That implies OnceCallback::IsCancelled returns false
when it's a nested callback and the inner callback is a cancelled OnceCallback.

Committed: https://crrev.com/44adf07a8104da5e1ff35b9f57e30ad050d5f301
Cr-Commit-Position: refs/heads/master@{#423796}
==========

[commit-bot: I haz the power, 2016-10-07 04:37:18]

Patchset 3 (id:??) landed as
https://crrev.com/44adf07a8104da5e1ff35b9f57e30ad050d5f301
Cr-Commit-Position: refs/heads/master@{#423796}