Third Party authentication protocol.

remoting/protocol/authenticator.cc

Index: remoting/protocol/authenticator.cc
diff --git a/remoting/protocol/authenticator.cc b/remoting/protocol/authenticator.cc
index 168af76902d33f6d4217d2398600f4d13a5c7cf2..24ab2326d0f5cbcf91574e5463724d0513498a1e 100644
--- a/remoting/protocol/authenticator.cc
+++ b/remoting/protocol/authenticator.cc
@@ -4,6 +4,7 @@
 
 #include "remoting/protocol/authenticator.h"
 
+#include "base/logging.h"
 #include "remoting/base/constants.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
 
@@ -32,5 +33,11 @@ const buzz::XmlElement* Authenticator::FindAuthenticatorMessage(
   return message->FirstNamed(kAuthenticationQName);
 }
 
+void Authenticator::PerformExternalAction(
+    const base::Closure& resume_callback) {
+  // Implementations that use a WAITING_EXTERNAL state must override this.
+  NOTREACHED();
+}
+
 }  // namespace protocol
 }  // namespace remoting