[NaCl SDK] ppapi_simple: Don't initialize nacl_io when running in sel_ldr

[NaCl SDK] ppapi_simple: Don't initialize nacl_io when running in sel_ldr

When running ppapi_simple-based application in sel_ldr
we almost never want to use nacl_io so don't initialize
it by default.  This makes it easier for application build
on ppapi_simple to run both under and Chrome and sel_ldr.

Committed: https://crrev.com/918b8195c559db1316fd6b1c961324cd0a53721a
Cr-Commit-Position: refs/heads/master@{#318569}

[Sam Clegg, 2015-02-27 21:24:50]

sbc@chromium.org changed reviewers:
+ binji@chromium.org

[Sam Clegg, 2015-02-27 23:32:01]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2015-02-27 23:32:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/964983002/1

[commit-bot: I haz the power, 2015-02-27 23:32:39]

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

[commit-bot: I haz the power, 2015-02-27 23:32:39]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[binji, 2015-02-28 00:09:34]

lgtm

[Sam Clegg, 2015-02-28 00:26:30]

The CQ bit was checked by sbc@chromium.org

[commit-bot: I haz the power, 2015-02-28 00:28:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/964983002/1

[commit-bot: I haz the power, 2015-02-28 01:54:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-28 01:55:12]

Patchset 1 (id:??) landed as
https://crrev.com/918b8195c559db1316fd6b1c961324cd0a53721a
Cr-Commit-Position: refs/heads/master@{#318569}