Type conversion fixes, content/ edition.

Type conversion fixes, content/ edition.

This is mostly to fix MSVC warnings about possible value truncation.

BUG=81439
TEST=none
TBR=cpu

Committed: https://crrev.com/dabefe46bc8eb3537d4cee6826d88f8d06e13d52
Cr-Commit-Position: refs/heads/master@{#300159}

[Peter Kasting, 2014-10-16 22:51:05]

pkasting@chromium.org changed reviewers:
+ avi@chromium.org

[Avi (use Gerrit), 2014-10-17 19:40:45]

lgtm

[Peter Kasting, 2014-10-17 20:33:43]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2014-10-17 20:35:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/661833004/1

[commit-bot: I haz the power, 2014-10-17 20:43:54]

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

[commit-bot: I haz the power, 2014-10-17 20:43:55]

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

[Peter Kasting, 2014-10-17 20:45:34]

pkasting@chromium.org changed reviewers:
+ cpu@chromium.org

[Peter Kasting, 2014-10-17 20:45:49]

TBRing cpu for trivial change in content/common/sandbox_win.cc.

[Peter Kasting, 2014-10-17 20:45:54]

The CQ bit was checked by pkasting@chromium.org

[commit-bot: I haz the power, 2014-10-17 20:47:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/661833004/1

[commit-bot: I haz the power, 2014-10-17 20:54:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-17 20:54:34]

Patchset 1 (id:??) landed as
https://crrev.com/dabefe46bc8eb3537d4cee6826d88f8d06e13d52
Cr-Commit-Position: refs/heads/master@{#300159}