Remove implicit conversions from scoped_refptr to T* in net/

Remove implicit conversions from scoped_refptr to T* in net/

This patch was generated by running the rewrite_scoped_refptr clang tool
on a Windows build.

BUG=110610
Committed: https://crrev.com/409765ac7530f4f3422e7c282ae072f2e749ef7b
Cr-Commit-Position: refs/heads/master@{#303942}

[dcheng, 2014-11-12 23:24:30]

dcheng@chromium.org changed reviewers:
+ rvargas@chromium.org

[rvargas (doing something else), 2014-11-12 23:52:48]

lgtm

[dcheng, 2014-11-12 23:55:06]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-11-12 23:56:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/724553002/1

[commit-bot: I haz the power, 2014-11-13 00:50:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-13 00:52:38]

Patchset 1 (id:??) landed as
https://crrev.com/409765ac7530f4f3422e7c282ae072f2e749ef7b
Cr-Commit-Position: refs/heads/master@{#303942}