Add a continual_gathering_policy in PeerConnection RTCConfiguration

talk/app/webrtc/webrtcsession.h

Index: talk/app/webrtc/webrtcsession.h
diff --git a/talk/app/webrtc/webrtcsession.h b/talk/app/webrtc/webrtcsession.h
index 1ad9a69e5953ecfd65c2e32b8e45e8e1c2c5034a..b3d76bf6b443043ec402cadd002a96697a1f5dae 100644
--- a/talk/app/webrtc/webrtcsession.h
+++ b/talk/app/webrtc/webrtcsession.h
@@ -178,6 +178,9 @@ class WebRtcSession : public cricket::BaseSession,
 
   bool SetIceTransports(PeerConnectionInterface::IceTransportsType type);
 
+  cricket::IceConfig ParseIceConfig(
+      const PeerConnectionInterface::RTCConfiguration& config) const;
+
   const SessionDescriptionInterface* local_description() const {
     return local_desc_.get();
   }