CHECK that QuicHttpStream::callback_ is null in any methods which may

CHECK that QuicHttpStream::callback_ is null in any methods which may
set the callback. Should help explain how we're crashing in
http://crbug.com/640288

BUG=640288
Committed: https://crrev.com/29c9de5f7c2a8dcf3eb4acff102561a684bb6665
Cr-Commit-Position: refs/heads/master@{#414213}

[Ryan Hamilton, 2016-08-23 22:34:58]

rch@chromium.org changed reviewers:
+ zhongyi@chromium.org

[Zhongyi Shi, 2016-08-24 17:32:59]

lgtm. Sorry about the delay.

[Ryan Hamilton, 2016-08-24 18:25:13]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2016-08-24 18:25:54]

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 22:50:01]

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

[commit-bot: I haz the power, 2016-08-24 22:50:02]

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...)

[Ryan Hamilton, 2016-08-24 22:51:02]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2016-08-24 22:52:08]

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 00:17:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-25 00:20:19]

Description was changed from

==========
CHECK that QuicHttpStream::callback_ is null in any methods which may
set the callback. Should help explain how we're crashing in
http://crbug.com/640288

BUG=640288
==========

to

==========
CHECK that QuicHttpStream::callback_ is null in any methods which may
set the callback. Should help explain how we're crashing in
http://crbug.com/640288

BUG=640288

Committed: https://crrev.com/29c9de5f7c2a8dcf3eb4acff102561a684bb6665
Cr-Commit-Position: refs/heads/master@{#414213}
==========

[commit-bot: I haz the power, 2016-08-25 00:20:20]

Patchset 1 (id:??) landed as
https://crrev.com/29c9de5f7c2a8dcf3eb4acff102561a684bb6665
Cr-Commit-Position: refs/heads/master@{#414213}