Revert of [Sync] Refactoring polling to be reliable.

sync/internal_api/public/sync_manager.h

 // Copyright 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 SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_
 #define SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 280 matching lines @@
   // Purge from the directory those types with non-empty progress markers
   // but without initial synced ended set.
   // Returns false if an error occurred, true otherwise.
   virtual bool PurgePartiallySyncedTypes() = 0;
 
   // Update tokens that we're using in Sync. Email must stay the same.
   virtual void UpdateCredentials(const SyncCredentials& credentials) = 0;
 
   // Put the syncer in normal mode ready to perform nudges and polls.
   virtual void StartSyncingNormally(
-      const ModelSafeRoutingInfo& routing_info,
-      base::Time last_poll_time) = 0;
+      const ModelSafeRoutingInfo& routing_info) = 0;
 
   // Switches the mode of operation to CONFIGURATION_MODE and performs
   // any configuration tasks needed as determined by the params. Once complete,
   // syncer will remain in CONFIGURATION_MODE until StartSyncingNormally is
   // called.
   // Data whose types are not in |new_routing_info| are purged from sync
   // directory, unless they're part of |to_ignore|, in which case they're left
   // untouched. The purged data is backed up in delete journal for recovery in
   // next session if its type is in |to_journal|. If in |to_unapply|
   // only the local data is removed; the server data is preserved.
@@ skipping 79 matching lines @@
       syncer::TypeDebugInfoObserver* observer) = 0;
 
   // Request that all current counter values be emitted as though they had just
   // been updated.  Useful for initializing new observers' state.
   virtual void RequestEmitDebugInfo() = 0;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_