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

sync/engine/download_updates_command.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_
 #define SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "sync/engine/syncer_command.h"
@@ skipping 18 matching lines @@
 // in the SyncSession. Only one server request is performed per Execute
 // operation. A loop that causes multiple Execute operations within a sync
 // session can be found in the Syncer logic. When looping, the
 // DownloadUpdatesCommand consumes the information stored by the
 // StoreTimestampsCommand.
 //
 // In practice, DownloadUpdatesCommand should loop until all updates are
 // downloaded for all enabled datatypes (i.e., until the server indicates
 // changes_remaining == 0 in the GetUpdates response), or until an error
 // is encountered.
-class DownloadUpdatesCommand : public SyncerCommand {
+class SYNC_EXPORT_PRIVATE DownloadUpdatesCommand : public SyncerCommand {
  public:
   // |create_mobile_bookmarks_folder| controls whether or not to
   // create the mobile bookmarks folder if it's not already created.
   // Should be set to true only by mobile clients.
   explicit DownloadUpdatesCommand(bool create_mobile_bookmarks_folder);
   virtual ~DownloadUpdatesCommand();
 
   // SyncerCommand implementation.
   virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(DownloadUpdatesCommandTest, VerifyAppendDebugInfo);
   void AppendClientDebugInfoIfNeeded(sessions::SyncSession* session,
       sync_pb::DebugInfo* debug_info);
 
   const bool create_mobile_bookmarks_folder_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadUpdatesCommand);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_DOWNLOAD_UPDATES_COMMAND_H_