Use new web-page-replay mirror.

Use new web-page-replay mirror.
Old one was broken by a "git push --force".
The new mirror's path makes it clear that it is a github mirror.

BUG=470159
Committed: https://crrev.com/e80156ffd5b377f9709b9664c39ac93e58ad5539
Cr-Commit-Position: refs/heads/master@{#322693}

[slamm, 2015-03-27 23:53:36]

slamm@chromium.org changed reviewers:
+ iannucci@chromium.org, nednguyen@google.com

[iannucci, 2015-03-28 00:01:46]

lgtm

[nednguyen, 2015-03-28 00:47:14]

lgtm

[slamm, 2015-03-28 01:43:16]

The CQ bit was checked by slamm@chromium.org

[commit-bot: I haz the power, 2015-03-28 01:43:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1046473002/1

[commit-bot: I haz the power, 2015-03-28 01:46:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-28 01:47:02]

Patchset 1 (id:??) landed as
https://crrev.com/e80156ffd5b377f9709b9664c39ac93e58ad5539
Cr-Commit-Position: refs/heads/master@{#322693}