TCP remote socket address should have both server hostname and IP address.
Hostname is necessary when we are creating TLS based socket, for certificate
verification.

BUG=https://code.google.com/p/chromium/issues/detail?id=306285
R=jiayl@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/19489004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6165 4adac7df-926f-26a2-2b94-8c16560cd09d