Fix BytesConsumer::read

Fix BytesConsumer::read

*readSize should be set to zero when returning errors.

BUG=610195
Committed: https://crrev.com/5119566686b8fd231f014559d37027e20a9b42ac
Cr-Commit-Position: refs/heads/master@{#418281}

[yhirano, 2016-09-07 11:21:01]

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

[commit-bot: I haz the power, 2016-09-07 11:21:15]

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

[yhirano, 2016-09-07 11:21:49]

yhirano@chromium.org changed reviewers:
+ hiroshige@chromium.org

[hiroshige, 2016-09-07 13:02:59]

lgtm.

In general, the test coverage for the case where endRead() returns non-Ok is
quite low, but that doesn't block this (and other related) CLs.

[commit-bot: I haz the power, 2016-09-07 13:09:28]

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

[commit-bot: I haz the power, 2016-09-07 13:09:29]

Dry run: This issue passed the CQ dry run.

[yhirano, 2016-09-07 13:22:59]

The CQ bit was checked by yhirano@chromium.org

[commit-bot: I haz the power, 2016-09-07 13:23:06]

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

[commit-bot: I haz the power, 2016-09-07 13:23:07]

This CL has an open dependency (Issue 2269953004 Patch 200001). Please resolve
the dependency and try again.
If you are sure that there is no real dependency, please use one of the options
listed in https://goo.gl/9Es4OR to land the CL.

[yhirano, 2016-09-13 15:57:55]

The CQ bit was checked by yhirano@chromium.org

[commit-bot: I haz the power, 2016-09-13 15:58:20]

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, 2016-09-13 17:17:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-13 17:18:42]

Description was changed from

==========
Fix BytesConsumer::read

*readSize should be set to zero when returning errors.

BUG=610195
==========

to

==========
Fix BytesConsumer::read

*readSize should be set to zero when returning errors.

BUG=610195

Committed: https://crrev.com/5119566686b8fd231f014559d37027e20a9b42ac
Cr-Commit-Position: refs/heads/master@{#418281}
==========

[commit-bot: I haz the power, 2016-09-13 17:18:43]

Patchset 1 (id:??) landed as
https://crrev.com/5119566686b8fd231f014559d37027e20a9b42ac
Cr-Commit-Position: refs/heads/master@{#418281}