Cancel pending stream requests as soon as a QUIC session is closed

Cancel pending stream requests as soon as a QUIC session is closed
instead of waiting for it be be destroyed.

Add tests for the cases where a connection is close before a StreamRequest
completes (both sync and async).

BUG=716563
Review-Url: https://codereview.chromium.org/2854443003
Cr-Commit-Position: refs/heads/master@{#468216}
Committed: https://chromium.googlesource.com/chromium/src/+/94c26d6895a4e7db8b276d79189cab14dee4cc6a

[Ryan Hamilton, 2017-04-28 20:05:58]

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

[Jana, 2017-04-29 00:01:49]

lgtm

[Ryan Hamilton, 2017-04-29 01:42:11]

The CQ bit was checked by rch@chromium.org

[commit-bot: I haz the power, 2017-04-29 01:42:41]

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, 2017-04-29 02:49:30]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493430131644570, "parent_rev":
"e9dc7878f8518160a357f245591a1a9705be9122", "commit_rev":
"94c26d6895a4e7db8b276d79189cab14dee4cc6a"}

[commit-bot: I haz the power, 2017-04-29 02:49:42]

Description was changed from

==========
Cancel pending stream requests as soon as a QUIC session is closed
instead of waiting for it be be destroyed.

Add tests for the cases where a connection is close before a StreamRequest
completes (both sync and async).

BUG=716563
==========

to

==========
Cancel pending stream requests as soon as a QUIC session is closed
instead of waiting for it be be destroyed.

Add tests for the cases where a connection is close before a StreamRequest
completes (both sync and async).

BUG=716563

Review-Url: https://codereview.chromium.org/2854443003
Cr-Commit-Position: refs/heads/master@{#468216}
Committed:
https://chromium.googlesource.com/chromium/src/+/94c26d6895a4e7db8b276d79189c...
==========

[commit-bot: I haz the power, 2017-04-29 02:49:43]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/94c26d6895a4e7db8b276d79189c...