Update error code to ITEM_FAILURE for MAC decrypted the password.

components/password_manager/core/browser/login_database_mac.cc

Index: components/password_manager/core/browser/login_database_mac.cc
diff --git a/components/password_manager/core/browser/login_database_mac.cc b/components/password_manager/core/browser/login_database_mac.cc
index ffaa1c344411a93f8b44dbf998b238a36bd397a6..44b43ee0c194b5358ba5ac6a0961680ae3928117 100644
--- a/components/password_manager/core/browser/login_database_mac.cc
+++ b/components/password_manager/core/browser/login_database_mac.cc
@@ -23,7 +23,7 @@ LoginDatabase::EncryptionResult LoginDatabase::DecryptedString(
     base::string16* plain_text) {
   return OSCrypt::DecryptString16(cipher_text, plain_text)
              ? ENCRYPTION_RESULT_SUCCESS
-             : ENCRYPTION_RESULT_SERVICE_FAILURE;
+             : ENCRYPTION_RESULT_ITEM_FAILURE;
 }
 
 }  // namespace password_manager