Revert of [Sync] Refactoring polling to be reliable.

sync/sessions/sync_session.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.
 
 #include "sync/sessions/sync_session.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/logging.h"
@@ skipping 42 matching lines @@
   SyncSessionSnapshot snapshot(
       status_controller_->model_neutral_state(),
       download_progress_markers,
       delegate_->IsCurrentlyThrottled(),
       status_controller_->num_encryption_conflicts(),
       status_controller_->num_hierarchy_conflicts(),
       status_controller_->num_server_conflicts(),
       context_->notifications_enabled(),
       dir->GetEntriesCount(),
       status_controller_->sync_start_time(),
-      status_controller_->poll_finish_time(),
       num_entries_by_type,
       num_to_delete_entries_by_type,
       legacy_updates_source);
 
   return snapshot;
 }
 
 void SyncSession::SendSyncCycleEndEventNotification(
     sync_pb::GetUpdatesCallerInfo::GetUpdatesSource source) {
   SyncCycleEvent event(SyncCycleEvent::SYNC_CYCLE_ENDED);
@@ skipping 17 matching lines @@
 }
 
 void SyncSession::SendProtocolEvent(const ProtocolEvent& event) {
   FOR_EACH_OBSERVER(SyncEngineEventListener,
                     *(context_->listeners()),
                     OnProtocolEvent(event));
 }
 
 }  // namespace sessions
 }  // namespace syncer