Disable implicit conversions from scoped_refptr to T* on iOS.

Disable implicit conversions from scoped_refptr to T* on iOS.

BUG=110610
Committed: https://crrev.com/ad794d3c472690a8f9ac1772b56829185c177d00
Cr-Commit-Position: refs/heads/master@{#299238}

[dcheng, 2014-10-10 17:11:47]

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

[dcheng, 2014-10-10 17:11:48]

This is blocked on two internal-only patches, but I found no public code that
needed to be rewritten.

https://chromereviews.googleplex.com/96427013 and
https://chromereviews.googleplex.com/102017013/ are the internal patches that
need to land first.

[danakj, 2014-10-10 17:15:55]

LGTM

[dcheng, 2014-10-11 03:33:35]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-10-11 03:34:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/643193002/1

[commit-bot: I haz the power, 2014-10-11 05:13:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-10-11 05:13:08]

Try jobs failed on following builders:
  linux_chromium_chromeos_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[dcheng, 2014-10-11 05:26:35]

The CQ bit was checked by dcheng@chromium.org

[commit-bot: I haz the power, 2014-10-11 05:26:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/643193002/1

[commit-bot: I haz the power, 2014-10-11 06:55:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-11 06:56:16]

Patchset 1 (id:??) landed as
https://crrev.com/ad794d3c472690a8f9ac1772b56829185c177d00
Cr-Commit-Position: refs/heads/master@{#299238}