Make local functions static and dropWebRtcNs_ in ns_core
Make local functions static and dropWebRtcNs_ in ns_core

This is only to make the code more readable and maintainable.
It generates bit-exact output.

BUG=webrtc:3811
R=bjornv@webrtc.org, kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/31809004

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@7548 4adac7df-926f-26a2-2b94-8c16560cd09d

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