Ensures that we can build using VS 2012 on Windows.

See more details at https://code.google.com/p/webrtc/issues/detail?id=1146&

TBR=Niklas
BUG=1146

Review URL: https://webrtc-codereview.appspot.com/939028

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3162 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed