Convert //remoting to use std::unique_ptr

remoting/protocol/rejecting_authenticator.h

Index: remoting/protocol/rejecting_authenticator.h
diff --git a/remoting/protocol/rejecting_authenticator.h b/remoting/protocol/rejecting_authenticator.h
index 6386c849cddde5f0d75c5e0b45a5610fc1a71402..8f6c946786450fb2944681da4d12fa0d8686706b 100644
--- a/remoting/protocol/rejecting_authenticator.h
+++ b/remoting/protocol/rejecting_authenticator.h
@@ -25,9 +25,10 @@ class RejectingAuthenticator : public Authenticator {
   RejectionReason rejection_reason() const override;
   void ProcessMessage(const buzz::XmlElement* message,
                       const base::Closure& resume_callback) override;
-  scoped_ptr<buzz::XmlElement> GetNextMessage() override;
+  std::unique_ptr<buzz::XmlElement> GetNextMessage() override;
   const std::string& GetAuthKey() const override;
-  scoped_ptr<ChannelAuthenticator> CreateChannelAuthenticator() const override;
+  std::unique_ptr<ChannelAuthenticator> CreateChannelAuthenticator()
+      const override;
 
  private:
   RejectionReason rejection_reason_;