Fix compile errors when DEBUG_AUDIONODE_REFERENCES is set.

Fix compile errors when DEBUG_AUDIONODE_REFERENCES is set.

BUG=596649
TEST=Change DEBUG_AUDIONODE_REFERENCES to 1 in AudioNode.h and compile

Committed: https://crrev.com/139db7daa31f10c5d136d058ef1995868c7d25dd
Cr-Commit-Position: refs/heads/master@{#382414}

[Raymond Toy, 2016-03-21 20:53:04]

rtoy@chromium.org changed reviewers:
+ hongchan@chromium.org

[Raymond Toy, 2016-03-21 20:53:05]

PTAL

[hongchan, 2016-03-21 20:56:09]

lgtm

[Raymond Toy, 2016-03-21 21:00:27]

The CQ bit was checked by rtoy@chromium.org

[commit-bot: I haz the power, 2016-03-21 21:01:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1816283002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1816283002/1

[commit-bot: I haz the power, 2016-03-21 22:14:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-21 22:16:24]

Description was changed from

==========
Fix compile errors when DEBUG_AUDIONODE_REFERENCES is set.

BUG=596649
TEST=Change DEBUG_AUDIONODE_REFERENCES to 1 in AudioNode.h and compile
==========

to

==========
Fix compile errors when DEBUG_AUDIONODE_REFERENCES is set.

BUG=596649
TEST=Change DEBUG_AUDIONODE_REFERENCES to 1 in AudioNode.h and compile

Committed: https://crrev.com/139db7daa31f10c5d136d058ef1995868c7d25dd
Cr-Commit-Position: refs/heads/master@{#382414}
==========

[commit-bot: I haz the power, 2016-03-21 22:16:25]

Patchset 1 (id:??) landed as
https://crrev.com/139db7daa31f10c5d136d058ef1995868c7d25dd
Cr-Commit-Position: refs/heads/master@{#382414}