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The spec does not say the DataChannel has to be open to receive a message. TBR=pthatcher@google.com BUG=crbug/363005 Review URL: https://webrtc-codereview.appspot.com/16569004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@6264 4adac7df-926f-26a2-2b94-8c16560cd09d