Refactor of Authenticator to allow it to ProcessMessage asynchronously and then call a callback

remoting/protocol/fake_authenticator.h

Index: remoting/protocol/fake_authenticator.h
diff --git a/remoting/protocol/fake_authenticator.h b/remoting/protocol/fake_authenticator.h
index a6ab85ed77c908ed4cf605cf6f6c89f9e02322fb..750c9371df679076bad8b6df59bed47f65b0532c 100644
--- a/remoting/protocol/fake_authenticator.h
+++ b/remoting/protocol/fake_authenticator.h
@@ -64,7 +64,8 @@ class FakeAuthenticator : public Authenticator {
   // Authenticator interface.
   virtual State state() const OVERRIDE;
   virtual RejectionReason rejection_reason() const OVERRIDE;
-  virtual void ProcessMessage(const buzz::XmlElement* message) OVERRIDE;
+  virtual void ProcessMessage(const base::Closure& resume_callback,
+                              const buzz::XmlElement* message) OVERRIDE;
   virtual scoped_ptr<buzz::XmlElement> GetNextMessage() OVERRIDE;
   virtual scoped_ptr<ChannelAuthenticator>
       CreateChannelAuthenticator() const OVERRIDE;