Created AttestationPolicyObserver.

chromeos/attestation/attestation_flow.h

Index: chromeos/attestation/attestation_flow.h
diff --git a/chromeos/attestation/attestation_flow.h b/chromeos/attestation/attestation_flow.h
index 8e7bb1801354b6ed117221634dda1437aefcd611..d660c2acc3dca23fb67ca281dd730d11cb1efb60 100644
--- a/chromeos/attestation/attestation_flow.h
+++ b/chromeos/attestation/attestation_flow.h
@@ -9,6 +9,7 @@
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_method_call_status.h"
@@ -52,9 +53,10 @@ class CHROMEOS_EXPORT AttestationFlow {
                               const std::string& pem_certificate_chain)>
       CertificateCallback;
 
+  // This class takes ownership only of |server_proxy|.
   AttestationFlow(cryptohome::AsyncMethodCaller* async_caller,
                   CryptohomeClient* cryptohome_client,
-                  ServerProxy* server_proxy);
+                  scoped_ptr<ServerProxy> server_proxy);
   virtual ~AttestationFlow();
 
   // Asynchronously gets an attestation certificate bound to the given name.
@@ -161,7 +163,7 @@ class CHROMEOS_EXPORT AttestationFlow {
   base::WeakPtrFactory<AttestationFlow> weak_factory_;
   cryptohome::AsyncMethodCaller* async_caller_;
   CryptohomeClient* cryptohome_client_;
-  ServerProxy* server_proxy_;
+  scoped_ptr<ServerProxy> server_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(AttestationFlow);
 };