Clean up some warnings about unused code.

Clean up some warnings about unused code.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/d157b6aed2eff5f8bc5f6c751be4dec514d878d2

[mtklein, 2014-10-20 18:02:34]

mtklein@google.com changed reviewers:
+ mtklein@google.com, sugoi@google.com

[mtklein, 2014-10-20 18:02:38]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-10-20 18:03:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/663093004/1

[commit-bot: I haz the power, 2014-10-20 18:03:43]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2014-10-21 00:03 UTC

[commit-bot: I haz the power, 2014-10-21 00:03:46]

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

[commit-bot: I haz the power, 2014-10-21 00:03:53]

No LGTM from a valid reviewer yet. Please ask for an LGTM from a
full Skia committer from
https://skia.googlesource.com/skia/+/master/CQ_COMMITTERS

[mtklein, 2014-10-21 14:20:40]

The CQ bit was checked by mtklein@google.com

[mtklein, 2014-10-21 14:20:40]

lgtm

[commit-bot: I haz the power, 2014-10-21 14:21:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/663093004/1

[commit-bot: I haz the power, 2014-10-21 14:21:40]

Committed patchset #1 (id:1) as d157b6aed2eff5f8bc5f6c751be4dec514d878d2