[Downloads] Move client guid for AV scanning of downloaded files to chrome/

content/public/browser/download_manager_delegate.h

 // Copyright (c) 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 CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
@@ skipping 111 matching lines @@
   virtual void OpenDownload(DownloadItem* download) {}
 
   // Shows the download via the OS shell.
   virtual void ShowDownloadInShell(DownloadItem* download) {}
 
   // Checks whether a downloaded file still exists.
   virtual void CheckForFileExistence(
       DownloadItem* download,
       const CheckForFileExistenceCallback& callback) {}
 
+  // Return a GUID string used for identifying the application to the
+  // system AV function for scanning downloaded files. If an empty
+  // or invalid GUID string is returned, no client identification
+  // will be given to the AV function.
+  virtual std::string ApplicationClientIdForFileScanning() const;
+
  protected:
   virtual ~DownloadManagerDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_