cros: Mount the existing eCryptfs vault to start migration.

chromeos/cryptohome/mock_homedir_methods.h

Index: chromeos/cryptohome/mock_homedir_methods.h
diff --git a/chromeos/cryptohome/mock_homedir_methods.h b/chromeos/cryptohome/mock_homedir_methods.h
index 48cb465e0b550a9ee5f18cd4d847e1199dce9a33..023c9f3f2e25180f9f10eb76dc4be1a4d86018ad 100644
--- a/chromeos/cryptohome/mock_homedir_methods.h
+++ b/chromeos/cryptohome/mock_homedir_methods.h
@@ -58,9 +58,8 @@ class CHROMEOS_EXPORT MockHomedirMethods : public HomedirMethods {
   MOCK_METHOD2(GetAccountDiskUsage,
                void(const Identification& id,
                     const GetAccountDiskUsageCallback& callback));
-  MOCK_METHOD3(MigrateToDircrypto,
+  MOCK_METHOD2(MigrateToDircrypto,
                void(const Identification& id,
-                    const Authorization& auth,
                     const DBusResultCallback& callback));
 
   void set_mount_callback(const base::Closure& callback) {