Remove implicit conversions from scoped_refptr to T* in chrome/browser/ui

Remove implicit conversions from scoped_refptr to T* in chrome/browser/ui

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

BUG=110610
Committed: https://crrev.com/abee4fef8c6b2078294f65f678d2f41e928ad311
Cr-Commit-Position: refs/heads/master@{#294940}

[dcheng, 2014-09-15 20:02:35]

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

[sky, 2014-09-15 21:51:29]

LGTM

[dcheng, 2014-09-15 22:09:38]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-09-15 22:39:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/556293004/20001

[commit-bot: I haz the power, 2014-09-16 00:31:25]

Committed patchset #2 (id:20001) as dfbcbbd3b0b439bf97c635d4e65e2b797047e183

[commit-bot: I haz the power, 2014-09-16 00:40:02]

Patchset 2 (id:??) landed as
https://crrev.com/abee4fef8c6b2078294f65f678d2f41e928ad311
Cr-Commit-Position: refs/heads/master@{#294940}