[sync] Fix decryption failure caused by missing user_key

components/sync/base/nigori_unittest.cc

Index: components/sync/base/nigori_unittest.cc
diff --git a/components/sync/base/nigori_unittest.cc b/components/sync/base/nigori_unittest.cc
index 09bbcd75a4039044752a160cee2b5edcaea56335..afa8466de56c4fdd5757b24b7b8dedf99d028c75 100644
--- a/components/sync/base/nigori_unittest.cc
+++ b/components/sync/base/nigori_unittest.cc
@@ -126,12 +126,13 @@ TEST(SyncNigoriTest, ExportImport) {
   Nigori nigori1;
   EXPECT_TRUE(nigori1.InitByDerivation("example.com", "username", "password"));
 
+  std::string user_key;
   std::string encryption_key;
   std::string mac_key;
-  EXPECT_TRUE(nigori1.ExportKeys(&encryption_key, &mac_key));
+  EXPECT_TRUE(nigori1.ExportKeys(&user_key, &encryption_key, &mac_key));
 
   Nigori nigori2;
-  EXPECT_TRUE(nigori2.InitByImport(encryption_key, mac_key));
+  EXPECT_TRUE(nigori2.InitByImport(user_key, encryption_key, mac_key));
 
   std::string original("test");
   std::string plaintext;