Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/attestation/attestation_policy_observer.h

Index: chrome/browser/chromeos/attestation/attestation_policy_observer.h
diff --git a/chrome/browser/chromeos/attestation/attestation_policy_observer.h b/chrome/browser/chromeos/attestation/attestation_policy_observer.h
index 86f225d3b14a1b9f8d352c2f65d6157a4a93b489..e564c30be3a9f6bc563ffcb2bc9bee6dbec26d3a 100644
--- a/chrome/browser/chromeos/attestation/attestation_policy_observer.h
+++ b/chrome/browser/chromeos/attestation/attestation_policy_observer.h
@@ -5,11 +5,11 @@
 #ifndef CHROME_BROWSER_CHROMEOS_ATTESTATION_ATTESTATION_POLICY_OBSERVER_H_
 #define CHROME_BROWSER_CHROMEOS_ATTESTATION_ATTESTATION_POLICY_OBSERVER_H_
 
+#include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 
@@ -93,11 +93,11 @@ class AttestationPolicyObserver {
   policy::CloudPolicyClient* policy_client_;
   CryptohomeClient* cryptohome_client_;
   AttestationFlow* attestation_flow_;
-  scoped_ptr<AttestationFlow> default_attestation_flow_;
+  std::unique_ptr<AttestationFlow> default_attestation_flow_;
   int num_retries_;
   int retry_delay_;
 
-  scoped_ptr<CrosSettings::ObserverSubscription> attestation_subscription_;
+  std::unique_ptr<CrosSettings::ObserverSubscription> attestation_subscription_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.