Do a null check in CronetURLRequestAdapter::GetStatusOnNetworkThread

Do a null check in CronetURLRequestAdapter::GetStatusOnNetworkThread

A recent change made startInternal() asynchronous when there is an upload,
if getStatus() is called right afterwards, we can get a native crash.

This CL adds a null check and a regression test.

BUG=606872
Committed: https://crrev.com/da26cb8e57a6d64ebf1f7d4e336aa6bbcdc2a189
Cr-Commit-Position: refs/heads/master@{#390079}

[xunjieli, 2016-04-26 19:41:46]

Patchset #1 (id:1) has been deleted

[xunjieli, 2016-04-26 19:41:51]

Patchset #1 (id:20001) has been deleted

[xunjieli, 2016-04-26 19:42:52]

xunjieli@chromium.org changed reviewers:
+ kapishnikov@chromium.org

[xunjieli, 2016-04-26 19:42:53]

Andrei, PTAL. Without the patch, the new test will result in a crash.

[xunjieli, 2016-04-27 01:25:42]

Patchset #2 (id:60001) has been deleted

[xunjieli, 2016-04-27 01:26:35]

Done. Thanks a lot for the very valuable test suggestion!

[kapishnikov, 2016-04-27 14:24:53]

LGTM

[xunjieli, 2016-04-27 14:26:48]

The CQ bit was checked by xunjieli@chromium.org

[commit-bot: I haz the power, 2016-04-27 14:27:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1924593002/80001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1924593002/80001

[commit-bot: I haz the power, 2016-04-27 15:09:01]

Committed patchset #2 (id:80001)

[commit-bot: I haz the power, 2016-04-27 15:10:27]

Description was changed from

==========
Do a null check in CronetURLRequestAdapter::GetStatusOnNetworkThread

A recent change made startInternal() asynchronous when there is an upload,
if getStatus() is called right afterwards, we can get a native crash.

This CL adds a null check and a regression test.

BUG=606872
==========

to

==========
Do a null check in CronetURLRequestAdapter::GetStatusOnNetworkThread

A recent change made startInternal() asynchronous when there is an upload,
if getStatus() is called right afterwards, we can get a native crash.

This CL adds a null check and a regression test.

BUG=606872

Committed: https://crrev.com/da26cb8e57a6d64ebf1f7d4e336aa6bbcdc2a189
Cr-Commit-Position: refs/heads/master@{#390079}
==========

[commit-bot: I haz the power, 2016-04-27 15:10:28]

Patchset 2 (id:??) landed as
https://crrev.com/da26cb8e57a6d64ebf1f7d4e336aa6bbcdc2a189
Cr-Commit-Position: refs/heads/master@{#390079}