[Sync] Refactoring polling to be reliable.

components/sync_driver/sync_prefs.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_SYNC_PREFS_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_PREFS_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 62 matching lines @@
 
   bool SyncHasAuthError() const;
   void SetSyncAuthError(bool error);
 
   bool IsStartSuppressed() const;
   void SetStartSuppressed(bool is_suppressed);
 
   base::Time GetLastSyncedTime() const;
   void SetLastSyncedTime(base::Time time);
 
+  base::Time GetLastPollTime() const;
+  void SetLastPollTime(base::Time time);
+
   bool HasKeepEverythingSynced() const;
   void SetKeepEverythingSynced(bool keep_everything_synced);
 
   // The returned set is guaranteed to be a subset of
   // |registered_types|.  Returns |registered_types| directly if
   // HasKeepEverythingSynced() is true.
   syncer::ModelTypeSet GetPreferredDataTypes(
       syncer::ModelTypeSet registered_types) const;
   // |preferred_types| should be a subset of |registered_types|.  All
   // types in |preferred_types| are marked preferred, and all types in
@@ skipping 82 matching lines @@
   // etc.
   typedef std::map<syncer::ModelType, syncer::ModelTypeSet> PrefGroupsMap;
   PrefGroupsMap pref_groups_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncPrefs);
 };
 
 }  // namespace sync_driver
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_PREFS_H_