[Sync] Support receiving early passphrase required information in Sync UI.

chrome/browser/sync/engine/syncapi.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.
 
 #include "chrome/browser/sync/engine/syncapi.h"
 
 #include <algorithm>
 #include <bitset>
 #include <iomanip>
 #include <list>
@@ skipping 1948 matching lines @@
   ObserverList<SyncManager::Observer> temp_obs_list;
   CopyObservers(&temp_obs_list);
   FOR_EACH_OBSERVER(SyncManager::Observer, temp_obs_list,
       OnAuthError(AuthError(AuthError::INVALID_GAIA_CREDENTIALS)));
 }
 
 void SyncManager::SyncInternal::SetPassphrase(
     const std::string& passphrase, bool is_explicit) {
   // We do not accept empty passphrases.
   if (passphrase.empty()) {
-    VLOG(1) << "Rejecting empty passphrase.";
+    NOTREACHED() << "Rejecting empty passphrase.";
     ObserverList<SyncManager::Observer> temp_obs_list;
     CopyObservers(&temp_obs_list);
     FOR_EACH_OBSERVER(SyncManager::Observer, temp_obs_list,
         OnPassphraseRequired(sync_api::REASON_SET_PASSPHRASE_FAILED));
     return;
   }
 
   // All accesses to the cryptographer are protected by a transaction.
   WriteTransaction trans(FROM_HERE, GetUserShare());
   Cryptographer* cryptographer = trans.GetCryptographer();
@@ skipping 1044 matching lines @@
 void SyncManager::TriggerOnIncomingNotificationForTest(
     const syncable::ModelTypeBitSet& model_types) {
   syncable::ModelTypePayloadMap model_types_with_payloads =
       syncable::ModelTypePayloadMapFromBitSet(model_types,
           std::string());
 
   data_->OnIncomingNotification(model_types_with_payloads);
 }
 
 }  // namespace sync_api