[Sync] Convert sync to a static library.

components/sync/syncable/directory_change_delegate.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 COMPONENTS_SYNC_SYNCABLE_DIRECTORY_CHANGE_DELEGATE_H_
 #define COMPONENTS_SYNC_SYNCABLE_DIRECTORY_CHANGE_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <vector>
 
 #include "components/sync/base/model_type.h"
-#include "components/sync/base/sync_export.h"
 #include "components/sync/syncable/write_transaction_info.h"
 
 namespace syncer {
 namespace syncable {
 
 // This is an interface for listening to directory change events, triggered by
 // the releasing of the syncable transaction. The delegate performs work to
 // 1. Calculate changes, depending on the source of the transaction
 //    (HandleCalculateChangesChangeEventFromSyncer/Syncapi).
 // 2. Perform final work while the transaction is held
 //    (HandleTransactionEndingChangeEvent).
 // 3. Perform any work that should be done after the transaction is released.
 //    (HandleTransactionCompleteChangeEvent).
 //
 // Note that these methods may be called on *any* thread.
-class SYNC_EXPORT DirectoryChangeDelegate {
+class DirectoryChangeDelegate {
  public:
   // Returns the handles of changed entries in |entry_changed|.
   virtual void HandleCalculateChangesChangeEventFromSyncApi(
       const ImmutableWriteTransactionInfo& write_transaction_info,
       BaseTransaction* trans,
       std::vector<int64_t>* entries_changed) = 0;
   // Returns the handles of changed entries in |entry_changed|.
   virtual void HandleCalculateChangesChangeEventFromSyncer(
       const ImmutableWriteTransactionInfo& write_transaction_info,
       BaseTransaction* trans,
       std::vector<int64_t>* entries_changed) = 0;
   // Must return the set of all ModelTypes that were modified in the
   // transaction.
   virtual ModelTypeSet HandleTransactionEndingChangeEvent(
       const ImmutableWriteTransactionInfo& write_transaction_info,
       BaseTransaction* trans) = 0;
   virtual void HandleTransactionCompleteChangeEvent(
       ModelTypeSet models_with_changes) = 0;
 
  protected:
   virtual ~DirectoryChangeDelegate() {}
 };
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SYNCABLE_DIRECTORY_CHANGE_DELEGATE_H_