[Sync] Refactoring polling to be reliable.

components/sync_driver/pref_names.cc

 // Copyright 2014 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 "components/sync_driver/pref_names.h"
 
 namespace sync_driver {
 
 namespace prefs {
 
 // 64-bit integer serialization of the base::Time when the last sync occurred.
 const char kSyncLastSyncedTime[] = "sync.last_synced_time";
 
+// 64-bit integer serialization of the base::Time of the last sync poll.
+const char kSyncLastPollTime[] = "sync.last_poll_time";
+
 // Boolean specifying whether the user finished setting up sync.
 const char kSyncHasSetupCompleted[] = "sync.has_setup_completed";
 
 // Boolean specifying whether sync has an auth error.
 const char kSyncHasAuthError[] = "sync.has_auth_error";
 
 // Boolean specifying whether to automatically sync all data types (including
 // future ones, as they're added).  If this is true, the following preferences
 // (kSyncBookmarks, kSyncPasswords, etc.) can all be ignored.
 const char kSyncKeepEverythingSynced[] = "sync.keep_everything_synced";
@@ skipping 68 matching lines @@
 
 // Stores how many times to try rollback before giving up.
 const char kSyncRemainingRollbackTries[] = "sync.remaining_rollback_tries";
 
 // Stores the timestamp of first sync.
 const char kSyncFirstSyncTime[] = "sync.first_sync_time";
 
 }  // namespace prefs
 
 }  // namespace sync_driver