prune down content_dll change to just the CONTENT_EXPORTS

content/browser/download/download_file_manager.h

Index: content/browser/download/download_file_manager.h
diff --git a/content/browser/download/download_file_manager.h b/content/browser/download/download_file_manager.h
index 5b237b11f777c25b7a68e41826f925f237ae08c8..db5a7964017ff44f42c4756449d994891e0f48ef 100644
--- a/content/browser/download/download_file_manager.h
+++ b/content/browser/download/download_file_manager.h
@@ -49,6 +49,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/timer.h"
 #include "content/browser/download/download_request_handle.h"
+#include "content/common/content_export.h"
 #include "net/base/net_errors.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -72,7 +73,7 @@ class DownloadFileManager
   explicit DownloadFileManager(ResourceDispatcherHost* rdh);
 
   // Called on shutdown on the UI thread.
-  void Shutdown();
+  CONTENT_EXPORT void Shutdown();
 
   // Called on the IO or UI threads.
   int GetNextId();