WebSocket ignores trailing whitespace test

WebSocket ignores trailing whitespace test

The old WebSocket implementation did not correctly ignore trailing
whitespace on response headers.

This test ensures that the issue does not regress in the new
implementation.

BUG=180504
TEST=net_unittests

Committed: https://crrev.com/5acb1faf770f6003c9a025ff6ea15ee718e3207a
Cr-Commit-Position: refs/heads/master@{#320728}

[Adam Rice, 2015-03-13 14:55:11]

ricea@chromium.org changed reviewers:
+ tyoshino@chromium.org

[Adam Rice, 2015-03-13 14:55:12]

Another regression test. No hurry on this one either.

[tyoshino (SeeGerritForStatus), 2015-03-16 14:07:20]

lgtm

[Adam Rice, 2015-03-16 14:13:08]

The CQ bit was checked by ricea@chromium.org

[commit-bot: I haz the power, 2015-03-16 14:13:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1001353002/1

[commit-bot: I haz the power, 2015-03-16 15:34:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-16 15:35:05]

Patchset 1 (id:??) landed as
https://crrev.com/5acb1faf770f6003c9a025ff6ea15ee718e3207a
Cr-Commit-Position: refs/heads/master@{#320728}