Use consistent types for leb128 decoder.

Use consistent types for leb128 decoder.

Use size_t throughout, and avoid mixing size_t and uint32_t.

No behavioural effect.  Unsigned leb128 is currently used
only on 32-bit arm, and here uint32_t and size_t are equivalent.

BUG=385553
Committed: https://crrev.com/7a2d857d70e8f38635dad6c183b87de1b3efa43a
Cr-Commit-Position: refs/heads/master@{#301080}

[simonb (inactive), 2014-10-23 17:44:17]

simonb@chromium.org changed reviewers:
+ rmcilroy@chromium.org

[rmcilroy, 2014-10-24 09:41:33]

lgtm, thanks.

[simonb (inactive), 2014-10-24 10:16:34]

The CQ bit was checked by simonb@chromium.org

[commit-bot: I haz the power, 2014-10-24 10:17:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/668543003/1

[commit-bot: I haz the power, 2014-10-24 10:59:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-24 11:00:13]

Patchset 1 (id:??) landed as
https://crrev.com/7a2d857d70e8f38635dad6c183b87de1b3efa43a
Cr-Commit-Position: refs/heads/master@{#301080}