[Sync] Refactoring polling to be reliable.

chrome/browser/sync/glue/sync_backend_host_core.h

 // Copyright 2013 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 CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_
 
 #include "base/memory/ref_counted.h"
 
 #include "base/timer/timer.h"
@@ skipping 132 matching lines @@
   // Called to perform initialization of the syncapi on behalf of
   // SyncBackendHost::Initialize.
   void DoInitialize(scoped_ptr<DoInitializeOptions> options);
 
   // Called to perform credential update on behalf of
   // SyncBackendHost::UpdateCredentials.
   void DoUpdateCredentials(const syncer::SyncCredentials& credentials);
 
   // Called to tell the syncapi to start syncing (generally after
   // initialization and authentication).
-  void DoStartSyncing(const syncer::ModelSafeRoutingInfo& routing_info);
+  void DoStartSyncing(const syncer::ModelSafeRoutingInfo& routing_info,
+                      base::Time last_poll_time);
 
   // Called to set the passphrase for encryption.
   void DoSetEncryptionPassphrase(const std::string& passphrase,
                                  bool is_explicit);
 
   // Called to decrypt the pending keys.
   void DoSetDecryptionPassphrase(const std::string& passphrase);
 
   // Called to turn on encryption of all sync data as well as
   // reencrypt everything.
@@ skipping 136 matching lines @@
   bool forward_type_info_;
 
   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_CORE_H_