Exclude unused functions for NaCl code path.

Exclude unused functions for NaCl code path.

An upcoming NaCl roll is going to update arm-nacl-gcc from 4.8.3 to version 4.9.2.
When -Wunused-function is specified, gcc 4.8.3 only warns unused static functions.
On the other hand, gcc 4.9.2 warns unused functions in anonymous namespace in addition to the unused static functions.
This change would cause compile errors because there are a few unused functions in anonymous namespace.
This CL fixes the compile errors of ARM build that the upcoming NaCl roll would cause.

BUG= https://code.google.com/p/nativeclient/issues/detail?id=3887
TEST=Locally update NaCl revision and ARM build succeeds.

Committed: https://crrev.com/9cfbcfb3e00697d3663a5dbf4fd8c81ae6970d97
Cr-Commit-Position: refs/heads/master@{#303847}

[mazda, 2014-11-12 04:24:32]

mazda@chromium.org changed reviewers:
+ mseaborn@chromium.org, teravest@chromium.org, thestig@chromium.org

[mazda, 2014-11-12 04:24:33]

PTAL

thestig,
Please do an OWNERS review for base/.

teravest,
Please do an OWNERS review for ppapi/.

Thanks,

[Lei Zhang, 2014-11-12 05:31:47]

lgtm

[Mark Seaborn, 2014-11-12 05:35:05]

LGTM

[teravest, 2014-11-12 15:32:33]

lgtm

[mazda, 2014-11-12 15:48:07]

Thank you all for the review. Will submit.

[mazda, 2014-11-12 15:48:14]

The CQ bit was checked by mazda@chromium.org

[commit-bot: I haz the power, 2014-11-12 15:49:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/711343002/60001

[commit-bot: I haz the power, 2014-11-12 17:07:21]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2014-11-12 17:08:08]

Patchset 4 (id:??) landed as
https://crrev.com/9cfbcfb3e00697d3663a5dbf4fd8c81ae6970d97
Cr-Commit-Position: refs/heads/master@{#303847}