Minimal attestation-based enrollment flow.

chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h

Index: chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h
diff --git a/chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h b/chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h
index cd9cb8fd08348ab81925d5396234ec1d2d26f963..3c7dfddc0d20b04a88745907a3592fd11d6293e2 100644
--- a/chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h
+++ b/chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h
@@ -90,15 +90,20 @@ class EnterpriseEnrollmentHelper {
   // If |fetch_additional_token| is true, the helper fetches an additional token
   // and passes it to the |status_consumer| on successful enrollment.
   // EnrollUsingAuthCode can be called only once during this object's lifetime,
-  // and only if neither of EnrollUsing* methods was called before.
+  // and only if none of the EnrollUsing* methods was called before.
   virtual void EnrollUsingAuthCode(const std::string& auth_code,
                                    bool fetch_additional_token) = 0;
 
   // Starts enterprise enrollment using |token|.
   // EnrollUsingToken can be called only once during this object's lifetime, and
-  // only if neither of EnrollUsing* was called before.
+  // only if none of the EnrollUsing* was called before.
   virtual void EnrollUsingToken(const std::string& token) = 0;
 
+  // Starts enterprise enrollment using PCA attestation.
+  // EnrollUsingAttestation can be called only once during the object's
+  // lifetime, and only if none of the EnrollUsing* was called before.
+  virtual void EnrollUsingAttestation() = 0;
+
   // Starts device attribute update process. First tries to get
   // permission to update device attributes for current user
   // using stored during enrollment oauth token.