Log the sync communication that happens between client and server.

sync/engine/syncer_unittest.cc

 // Copyright (c) 2012 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.
 //
 // Syncer unit tests. Unfortunately a lot of these tests
 // are outdated and need to be reworked and updated.
 
 #include <algorithm>
 #include <limits>
 #include <list>
@@ skipping 1009 matching lines @@
     EXPECT_TRUE(cryptographer(&wtrans)->encrypt_everything());
     EXPECT_TRUE(specifics.nigori().sync_tabs());
     // Supply the pending keys. Afterwards, we should be able to decrypt both
     // our own encrypted data and data encrypted by the other cryptographer,
     // but the key provided by the other cryptographer should be the default.
     EXPECT_TRUE(cryptographer(&wtrans)->DecryptPendingKeys(other_key_params));
     EXPECT_FALSE(cryptographer(&wtrans)->has_pending_keys());
     sync_pb::NigoriSpecifics* nigori = specifics.mutable_nigori();
     cryptographer(&wtrans)->GetKeys(nigori->mutable_encrypted());
     cryptographer(&wtrans)->UpdateNigoriFromEncryptedTypes(nigori);
-    // Normally this would be written as part of SetDecryptionPassphrase, but we
-    // do it manually for the test.
+    // Normally this would be written as part of SetPassphrase, but we do it
+    // manually for the test.
     nigori_entry.Put(SPECIFICS, specifics);
     nigori_entry.Put(IS_UNSYNCED, true);
   }
 
   SyncShareAsDelegate();
   {
     // Ensure everything is committed and stable now. The cryptographer
     // should be able to decrypt both sets of keys, sync_tabs should be true,
     // and the encrypted types should have been unioned.
     WriteTransaction wtrans(FROM_HERE, UNITTEST, directory());
@@ skipping 3472 matching lines @@
 
 TEST_F(SyncerPositionTiebreakingTest, MidLowHigh) {
   Add(mid_id_);
   Add(low_id_);
   Add(high_id_);
   SyncShareAsDelegate();
   ExpectLocalOrderIsByServerId();
 }
 
 }  // namespace browser_sync