Remove implicit conversions from scoped_refptr to T* in c/b/chromeos/file_system_provider

Remove implicit conversions from scoped_refptr to T* in c/b/chromeos/file_system_provider

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

BUG=110610
Committed: https://crrev.com/0c0930e5a6d6ca2921f6121f20d5de7604af3e5a
Cr-Commit-Position: refs/heads/master@{#295224}

[dcheng, 2014-09-17 02:24:33]

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

[dcheng, 2014-09-17 02:24:33]

Some more fixups needed as a result of CL churn today.

Hopefully this will be the last patch before I can disable the conversion
operator on CrOS too.

[satorux1, 2014-09-17 03:08:47]

lgtm

[dcheng, 2014-09-17 03:15:17]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-09-17 03:16:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/579663002/1

[commit-bot: I haz the power, 2014-09-17 03:50:59]

Committed patchset #1 (id:1) as 8f9955651e06d9ea647ed51a74831c822d063701

[commit-bot: I haz the power, 2014-09-17 03:51:37]

Patchset 1 (id:??) landed as
https://crrev.com/0c0930e5a6d6ca2921f6121f20d5de7604af3e5a
Cr-Commit-Position: refs/heads/master@{#295224}