Use scoped_ptr<>.Pass() to pass ownership in the remoting protocol code.

remoting/protocol/v1_authenticator.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_V1_AUTHENTICATOR_H_
 #define REMOTING_PROTOCOL_V1_AUTHENTICATOR_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "remoting/protocol/authenticator.h"
 
 namespace crypto {
 class RSAPrivateKey;
 }  // namespace base
 
 namespace remoting {
 namespace protocol {
 
 class V1ClientAuthenticator : public Authenticator {
  public:
   V1ClientAuthenticator(const std::string& local_jid,
                         const std::string& shared_secret);
   virtual ~V1ClientAuthenticator();
 
   // Authenticator interface.
   virtual State state() const OVERRIDE;
   virtual void ProcessMessage(const buzz::XmlElement* message) OVERRIDE;
-  virtual buzz::XmlElement* GetNextMessage() OVERRIDE;
-  virtual ChannelAuthenticator* CreateChannelAuthenticator() const OVERRIDE;
+  virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE;
+  virtual scoped_ptr<ChannelAuthenticator>
+      CreateChannelAuthenticator() const OVERRIDE;
 
  private:
   std::string local_jid_;
   std::string shared_secret_;
   std::string remote_cert_;
   State state_;
 
   DISALLOW_COPY_AND_ASSIGN(V1ClientAuthenticator);
 };
 
 class V1HostAuthenticator : public Authenticator {
  public:
   // Doesn't take ownership of |local_private_key|.
   V1HostAuthenticator(const std::string& local_cert,
                       const crypto::RSAPrivateKey& local_private_key,
                       const std::string& shared_secret,
                       const std::string& remote_jid);
   virtual ~V1HostAuthenticator();
 
   // Authenticator interface.
   virtual State state() const OVERRIDE;
   virtual void ProcessMessage(const buzz::XmlElement* message) OVERRIDE;
-  virtual buzz::XmlElement* GetNextMessage() OVERRIDE;
-  virtual ChannelAuthenticator* CreateChannelAuthenticator() const OVERRIDE;
+  virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE;
+  virtual scoped_ptr<ChannelAuthenticator>
+      CreateChannelAuthenticator() const OVERRIDE;
 
  private:
   std::string local_cert_;
   scoped_ptr<crypto::RSAPrivateKey> local_private_key_;
   std::string shared_secret_;
   std::string remote_jid_;
   State state_;
 
   DISALLOW_COPY_AND_ASSIGN(V1HostAuthenticator);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_V1_AUTHENTICATOR_H_