Remove implicit conversions from scoped_refptr to T* in device/

Remove implicit conversions from scoped_refptr to T* in device/

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

BUG=110610
Committed: https://crrev.com/d7dd48b1c3af2de5d8e4e05b5e9e40008617c68f
Cr-Commit-Position: refs/heads/master@{#295732}

[dcheng, 2014-09-19 17:01:38]

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

[rpaquay, 2014-09-19 17:15:52]

lgtm

[dcheng, 2014-09-19 17:16:56]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-09-19 17:18:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/584083002/1

[commit-bot: I haz the power, 2014-09-19 17:56:32]

Committed patchset #1 (id:1) as a2c98b1ce0aa2b87d5eba412c12fc151ee09540d

[commit-bot: I haz the power, 2014-09-19 17:57:11]

Patchset 1 (id:??) landed as
https://crrev.com/d7dd48b1c3af2de5d8e4e05b5e9e40008617c68f
Cr-Commit-Position: refs/heads/master@{#295732}