[Sync] Fix encryption/passphrase handling.

chrome/browser/sync/engine/syncapi_unittest.cc

 // Copyright (c) 2011 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.
 
 // Unit tests for the SyncApi. Note that a lot of the underlying
 // functionality is provided by the Syncable layer, which has its own
 // unit tests. We'll test SyncApi specific things in this harness.
 
 #include <cstddef>
 #include <map>
@@ skipping 1324 matching lines @@
                                                    true /* is encrypted */));
     EXPECT_TRUE(syncable::VerifyDataTypeEncryption(trans.GetWrappedTrans(),
                                                    trans.GetCryptographer(),
                                                    syncable::THEMES,
                                                    false /* not encrypted */));
   }
 
   // Trigger's a ReEncryptEverything with new passphrase.
   testing::Mock::VerifyAndClearExpectations(&observer_);
   EXPECT_CALL(observer_, OnPassphraseAccepted(_)).Times(1);
-  EXPECT_CALL(observer_, OnEncryptionComplete(_)).Times(1);
+  EXPECT_CALL(observer_, OnEncryptionComplete(encrypted_types)).Times(1);
   sync_manager_.SetPassphrase("new_passphrase", true);
   {
     ReadTransaction trans(FROM_HERE, sync_manager_.GetUserShare());
     EXPECT_EQ(encrypted_types, GetEncryptedTypes(&trans));
     EXPECT_TRUE(syncable::VerifyDataTypeEncryption(trans.GetWrappedTrans(),
                                                    trans.GetCryptographer(),
                                                    syncable::BOOKMARKS,
                                                    true /* is encrypted */));
     EXPECT_TRUE(syncable::VerifyDataTypeEncryption(trans.GetWrappedTrans(),
                                                    trans.GetCryptographer(),
                                                    syncable::SESSIONS,
                                                    true /* is encrypted */));
     EXPECT_TRUE(syncable::VerifyDataTypeEncryption(trans.GetWrappedTrans(),
                                                    trans.GetCryptographer(),
                                                    syncable::THEMES,
                                                    false /* not encrypted */));
   }
-  // Calling EncryptDataTypes with the same encrypted types should not trigger
-  // a re-encryption.
+  // Calling EncryptDataTypes with an empty encrypted types should not trigger
+  // a reencryption and should just notify immediately.
+  // TODO(zea): add logic to ensure nothing was written.
   testing::Mock::VerifyAndClearExpectations(&observer_);
   EXPECT_CALL(observer_, OnPassphraseAccepted(_)).Times(0);
-  EXPECT_CALL(observer_, OnEncryptionComplete(_)).Times(0);
+  EXPECT_CALL(observer_, OnEncryptionComplete(encrypted_types)).Times(1);
   sync_manager_.EncryptDataTypes(encrypted_types);
 }
 
 TEST_F(SyncManagerTest, SetPassphraseWithPassword) {
   EXPECT_TRUE(SetUpEncryption());
   {
     WriteTransaction trans(FROM_HERE, sync_manager_.GetUserShare());
     ReadNode root_node(&trans);
     root_node.InitByRootLookup();
 
@@ skipping 44 matching lines @@
   {
     ReadTransaction trans(FROM_HERE, sync_manager_.GetUserShare());
     ReadNode password_node(&trans);
     EXPECT_FALSE(password_node.InitByIdLookup(node_id));
   }
 }
 
 }  // namespace
 
 }  // namespace browser_sync