prune down content_dll change to just the CONTENT_EXPORTS

content/browser/download/drag_download_file.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_
 #define CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/linked_ptr.h"
 #include "content/browser/download/download_file.h"
 #include "content/browser/download/download_item.h"
 #include "content/browser/download/download_manager.h"
+#include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
 #include "ui/base/dragdrop/download_file_interface.h"
+#include "ui/base/ui_export.h"
 
 class TabContents;
 
 namespace net {
 class FileStream;
 }
 
-class DragDownloadFile : public ui::DownloadFileProvider,
-                         public DownloadManager::Observer,
-                         public DownloadItem::Observer {
+class CONTENT_EXPORT DragDownloadFile
+    : public ui::DownloadFileProvider,
+      public DownloadManager::Observer,
+      public DownloadItem::Observer {
  public:
   // On Windows, we need to download into a temporary file. Two threads are
   // involved: background drag-and-drop thread and UI thread.
   // The first parameter file_name_or_path should contain file name while the
   // second parameter file_stream should be NULL.
   //
   // On MacOSX, we need to download into a file stream that has already been
   // created. Only UI thread is involved.
   // The file path and file stream should be provided as the first two
   // parameters.
@@ skipping 70 matching lines @@
 
   // Access on UI thread.
   DownloadManager* download_manager_;
   bool download_manager_observer_added_;
   DownloadItem* download_item_;
 
   DISALLOW_COPY_AND_ASSIGN(DragDownloadFile);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_FILE_H_