Remove implicit HANDLE conversions from content.

Remove implicit HANDLE conversions from content.

BUG=416722
R=piman@chromium.org
TBR=cpu@chromium.org (sandbox_win.cc)

Committed: https://crrev.com/ff9eea50913e4d100cb2931050a6d5c83ad6c7ba
Cr-Commit-Position: refs/heads/master@{#296603}

[piman, 2014-09-24 23:31:27]

lgtm

[rvargas (doing something else), 2014-09-25 00:00:07]

The CQ bit was checked by rvargas@chromium.org

[commit-bot: I haz the power, 2014-09-25 00:02:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/606463002/1

[commit-bot: I haz the power, 2014-09-25 00:17:35]

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

[commit-bot: I haz the power, 2014-09-25 00:17:35]

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

[rvargas (doing something else), 2014-09-25 00:55:37]

The CQ bit was checked by rvargas@chromium.org

[commit-bot: I haz the power, 2014-09-25 00:58:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/606463002/1

[commit-bot: I haz the power, 2014-09-25 01:04:25]

Committed patchset #1 (id:1) as 187482b33c020c8b240fb1b1b58caf8c6acaff6a

[commit-bot: I haz the power, 2014-09-25 01:05:11]

Patchset 1 (id:??) landed as
https://crrev.com/ff9eea50913e4d100cb2931050a6d5c83ad6c7ba
Cr-Commit-Position: refs/heads/master@{#296603}