cros: Mount the existing eCryptfs vault to start migration.

chromeos/cryptohome/homedir_methods.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_CRYPTOHOME_HOMEDIR_METHODS_H_
 #define CHROMEOS_CRYPTOHOME_HOMEDIR_METHODS_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 89 matching lines @@
                                 const Identification& id_to,
                                 const Callback& callback) = 0;
 
   // Asks cryptohomed to compute the size of cryptohome for user identified by
   // |id|.
   virtual void GetAccountDiskUsage(
       const Identification& id,
       const GetAccountDiskUsageCallback& callback) = 0;
 
   // Asks cryptohomed to migrate the cryptohome to the new encryption method
-  // for the user specified by |id|, using |auth| to unlock the key.
+  // for the user specified by |id|.
   virtual void MigrateToDircrypto(const Identification& id,
-                                  const Authorization& auth,
                                   const DBusResultCallback& callback) = 0;
 
   // Creates the global HomedirMethods instance.
   static void Initialize();
 
   // Similar to Initialize(), but can inject an alternative
   // HomedirMethods such as MockHomedirMethods for testing.
   // The injected object will be owned by the internal pointer and deleted
   // by Shutdown().
   static void InitializeForTesting(HomedirMethods* homedir_methods);
 
   // Destroys the global HomedirMethods instance if it exists.
   static void Shutdown();
 
   // Returns a pointer to the global HomedirMethods instance.
   // Initialize() should already have been called.
   static HomedirMethods* GetInstance();
 };
 
 }  // namespace cryptohome
 
 #endif  // CHROMEOS_CRYPTOHOME_HOMEDIR_METHODS_H_