cryptohome: Add dbus method and signal name for encryption 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 16 matching lines @@
   typedef base::Callback<void(bool success, MountError return_code)> Callback;
   typedef base::Callback<void(
       bool success,
       MountError return_code,
       const std::vector<KeyDefinition>& key_definitions)> GetKeyDataCallback;
   typedef base::Callback<
       void(bool success, MountError return_code, const std::string& mount_hash)>
       MountCallback;
   typedef base::Callback<void(bool success, int64_t size)>
       GetAccountDiskUsageCallback;
+  typedef base::Callback<void(bool success)> DBusResultCallback;
 
   virtual ~HomedirMethods() {}
 
   // Asks cryptohomed to return data about the key identified by |label| for the
   // user identified by |id|. At present, this does not return any secret
   // information and the request does not need to be authenticated.
   virtual void GetKeyDataEx(const Identification& id,
                             const std::string& label,
                             const GetKeyDataCallback& callback) = 0;
 
@@ skipping 51 matching lines @@
   virtual void RenameCryptohome(const Identification& id_from,
                                 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.
+  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_