Unreviewed build fix for Windows.

* platform/graphics/avfoundation/InbandTextTrackPrivateAVF.cpp:
* platform/graphics/avfoundation/MediaPlayerPrivateAVFoundation.cpp:
* platform/graphics/avfoundation/cf/MediaPlayerPrivateAVFoundationCF.cpp:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173453 268f45cc-cd09-0410-ab3c-d52691b4dbfc