[Sync] Add support for server controlled nudge delays

sync/internal_api/sync_manager_impl.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_SYNC_MANAGER_H_
 #define SYNC_INTERNAL_API_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 112 matching lines @@
   virtual void OnEncryptedTypesChanged(
       ModelTypeSet encrypted_types,
       bool encrypt_everything) OVERRIDE;
   virtual void OnEncryptionComplete() OVERRIDE;
   virtual void OnCryptographerStateChanged(
       Cryptographer* cryptographer) OVERRIDE;
   virtual void OnPassphraseTypeChanged(
       PassphraseType type,
       base::Time explicit_passphrase_time) OVERRIDE;
 
-  static int GetDefaultNudgeDelay();
-  static int GetSlowNudgeDelay();
-
   // SyncEngineEventListener implementation.
   virtual void OnSyncCycleEvent(const SyncCycleEvent& event) OVERRIDE;
   virtual void OnActionableError(const SyncProtocolError& error) OVERRIDE;
   virtual void OnRetryTimeChanged(base::Time retry_time) OVERRIDE;
   virtual void OnThrottledTypesChanged(ModelTypeSet throttled_types) OVERRIDE;
   virtual void OnMigrationRequested(ModelTypeSet types) OVERRIDE;
   virtual void OnProtocolEvent(const ProtocolEvent& event) OVERRIDE;
 
   // ServerConnectionEventListener implementation.
   virtual void OnServerConnectionEvent(
@@ skipping 202 matching lines @@
   scoped_ptr<SyncEncryptionHandlerImpl> sync_encryption_handler_;
 
   base::WeakPtrFactory<SyncManagerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNC_MANAGER_H_