Add AuthPolicyLoginHelper

chromeos/dbus/auth_policy_client.h

Index: chromeos/dbus/auth_policy_client.h
diff --git a/chromeos/dbus/auth_policy_client.h b/chromeos/dbus/auth_policy_client.h
index 99c9b811c6ccfbede43344faed4eb363cbe5bb29..4eb76e277a6071905db854c2d11153bbc165689b 100644
--- a/chromeos/dbus/auth_policy_client.h
+++ b/chromeos/dbus/auth_policy_client.h
@@ -24,11 +24,11 @@ class CHROMEOS_EXPORT AuthPolicyClient : public DBusClient {
  public:
   // |user_id| is a unique id for the users. Using objectGUID from Active
   // Directory server.
-  using AuthCallback = base::Callback<void(
+  using AuthCallback = base::OnceCallback<void(
       authpolicy::ErrorType error,
       const authpolicy::ActiveDirectoryAccountData& account_data)>;
-  using JoinCallback = base::Callback<void(authpolicy::ErrorType error)>;
-  using RefreshPolicyCallback = base::Callback<void(bool success)>;
+  using JoinCallback = base::OnceCallback<void(authpolicy::ErrorType error)>;
+  using RefreshPolicyCallback = base::OnceCallback<void(bool success)>;
 
   ~AuthPolicyClient() override;
 
@@ -46,7 +46,7 @@ class CHROMEOS_EXPORT AuthPolicyClient : public DBusClient {
   virtual void JoinAdDomain(const std::string& machine_name,
                             const std::string& user_principal_name,
                             int password_fd,
-                            const JoinCallback& callback) = 0;
+                            JoinCallback callback) = 0;
 
   // Calls AuthenticateUser. It runs "kinit <user_principal_name> .. " which
   // does kerberos authentication against Active Directory server.
@@ -54,17 +54,17 @@ class CHROMEOS_EXPORT AuthPolicyClient : public DBusClient {
   // |callback| is called after getting (or failing to get) D-BUS response.
   virtual void AuthenticateUser(const std::string& user_principal_name,
                                 int password_fd,
-                                const AuthCallback& callback) = 0;
+                                AuthCallback callback) = 0;
 
   // Calls RefreshDevicePolicy - handle policy for the device.
   // Fetch GPO files from Active directory server, parse it, encode it into
   // protobuf and send to SessionManager. Callback is called after that.
-  virtual void RefreshDevicePolicy(const RefreshPolicyCallback& callback) = 0;
+  virtual void RefreshDevicePolicy(RefreshPolicyCallback callback) = 0;
 
   // Calls RefreshUserPolicy - handle policy for the user specified by
   // |account_id|. Similar to RefreshDevicePolicy.
   virtual void RefreshUserPolicy(const AccountId& account_id,
-                                 const RefreshPolicyCallback& callback) = 0;
+                                 RefreshPolicyCallback callback) = 0;
 
  protected:
   // Create() should be used instead.