o3d: Fix the mac build broken on r53286.
o3d: Fix the mac build broken on r53286.

BUG=None
TEST=None

Signed-off-by: Thiago Farina <tfarina@chromium.org>

Review URL: http://codereview.chromium.org/3026017

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@53291 0039d316-1c4b-4281-b951-d872f2087c98

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