Fix warning for multi line comment in QUIC.

Fix warning for multi line comment in QUIC.

Removed tailing \ character from the example usage to
make GCC to forget the multi-line comment warning.

BUG=410777
TEST=build with gcc

Committed: https://crrev.com/5cf5e939b7e43e2fed394058d892605bb3adb2c3
Cr-Commit-Position: refs/heads/master@{#293334}

[elecro, 2014-09-04 11:40:27]

pgal.u-szeged@partner.samsung.com changed reviewers:
+ rch@chromium.org

[elecro, 2014-09-04 11:40:27]

Removed trailing \ character from single line comment, just like it was before
the https://codereview.chromium.org/530343003 change.

[ramant (doing other things), 2014-09-04 16:32:14]

rtenneti@chromium.org changed reviewers:
+ rtenneti@chromium.org

[ramant (doing other things), 2014-09-04 16:32:14]

lgtm

[elecro, 2014-09-04 16:57:05]

The CQ bit was checked by pgal.u-szeged@partner.samsung.com

[commit-bot: I haz the power, 2014-09-04 17:02:46]

CQ is trying da patch. Follow status at

https://chromium-status.appspot.com/cq/pgal.u-szeged@partner.samsung.com/5343...

[commit-bot: I haz the power, 2014-09-04 21:03:33]

Committed patchset #1 (id:1) as 436aaffe6c30e7eb640a3b94431037a58f214bd8

[commit-bot: I haz the power, 2014-09-10 03:32:37]

Patchset 1 (id:??) landed as
https://crrev.com/5cf5e939b7e43e2fed394058d892605bb3adb2c3
Cr-Commit-Position: refs/heads/master@{#293334}