[sync] Componentize sync: Part 6: Add more SYNC_EXPORTs to files in src/sync/

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 113 matching lines @@
     // I/O to when it no longer holds any lock).
     virtual void OnChangesComplete(ModelType model_type) = 0;
 
    protected:
     virtual ~ChangeDelegate();
   };
 
   // Like ChangeDelegate, except called only on the sync thread and
   // not while a transaction is held.  For objects that want to know
   // when changes happen, but don't need to process them.
-  class ChangeObserver {
+  class SYNC_EXPORT_PRIVATE ChangeObserver {
    public:
     // Ids referred to in |changes| may or may not be in the write
     // transaction specified by |write_transaction_id|.  If they're
     // not, that means that the node didn't actually change, but we
     // marked them as changed for some other reason (e.g., siblings of
     // re-ordered nodes).
     //
     // TODO(sync, long-term): Ideally, ChangeDelegate/Observer would
     // be passed a transformed version of EntryKernelMutation instead
     // of a transaction that would have to be used to look up the
@@ skipping 275 matching lines @@
   // any remaining unsynced items.  May be called on any thread.
   virtual bool HasUnsyncedItems() = 0;
 
   // Returns the SyncManager's encryption handler.
   virtual SyncEncryptionHandler* GetEncryptionHandler() = 0;
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_SYNC_MANAGER_H_