sync: Buffer Protocol Events for about:sync page

sync/internal_api/public/events/get_updates_response_event.h

 // Copyright 2014 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_EVENTS_GET_UPDATES_RESPONSE_EVENT_H
 #define SYNC_INTERNAL_API_EVENTS_GET_UPDATES_RESPONSE_EVENT_H
 
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "base/values.h"
+#include "sync/base/sync_export.h"
 #include "sync/internal_api/public/events/protocol_event.h"
 #include "sync/internal_api/public/util/syncer_error.h"
 #include "sync/protocol/sync.pb.h"
 
 namespace syncer {
 
 // An event representing a GetUpdates response event from the server.
 //
 // Unlike the events for the request message, the response events are generic
 // and do not vary for each type of GetUpdate cycle.
-class GetUpdatesResponseEvent : public ProtocolEvent {
+class SYNC_EXPORT_PRIVATE GetUpdatesResponseEvent : public ProtocolEvent {
  public:
   GetUpdatesResponseEvent(
       base::Time timestamp,
       const sync_pb::ClientToServerResponse& response,
       SyncerError error);
 
   virtual ~GetUpdatesResponseEvent();
 
   virtual base::Time GetTimestamp() const OVERRIDE;
   virtual std::string GetType() const OVERRIDE;
   virtual std::string GetDetails() const OVERRIDE;
   virtual scoped_ptr<base::DictionaryValue> GetProtoMessage() const OVERRIDE;
   virtual scoped_ptr<ProtocolEvent> Clone() const OVERRIDE;
 
  private:
   const base::Time timestamp_;
   const sync_pb::ClientToServerResponse response_;
   const SyncerError error_;
 
   DISALLOW_COPY_AND_ASSIGN(GetUpdatesResponseEvent);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_EVENTS_GET_UPDATES_RESPONSE_EVENT_H