Pass file name when downloading OMA DRM files

chrome/browser/android/download/chrome_download_delegate.h

Index: chrome/browser/android/download/chrome_download_delegate.h
diff --git a/chrome/browser/android/download/chrome_download_delegate.h b/chrome/browser/android/download/chrome_download_delegate.h
index 8862ad680f57b0c54a550a880b90052a51d37483..9e0347b5b22610a727f1d1bdc63ef3e3f012ae48 100644
--- a/chrome/browser/android/download/chrome_download_delegate.h
+++ b/chrome/browser/android/download/chrome_download_delegate.h
@@ -25,7 +25,7 @@ class ChromeDownloadDelegate
   // TODO(qinmin): consolidate this with the static function above.
   void EnqueueDownloadManagerRequest(const std::string& url,
                                      const std::string& user_agent,
-                                     const std::string& content_disposition,
+                                     const base::string16& file_name,
                                      const std::string& mime_type,
                                      const std::string& cookie,
                                      const std::string& referer);