Refactoring DownloadManager::DownloadURL to add proper annotation.

content/browser/download/download_request_core.h

Index: content/browser/download/download_request_core.h
diff --git a/content/browser/download/download_request_core.h b/content/browser/download/download_request_core.h
index fc2ccd2ea085e17925fb5d64c03e2739392533c9..e2a9f802443e7d44c5b38b15dd654eceadd7ee4d 100644
--- a/content/browser/download/download_request_core.h
+++ b/content/browser/download/download_request_core.h
@@ -19,6 +19,7 @@
 #include "content/public/browser/download_save_info.h"
 #include "content/public/browser/download_url_parameters.h"
 #include "device/wake_lock/public/interfaces/wake_lock_service.mojom.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 
 namespace net {
 class HttpResponseHeaders;
@@ -105,7 +106,8 @@ class CONTENT_EXPORT DownloadRequestCore
 
   static std::unique_ptr<net::URLRequest> CreateRequestOnIOThread(
       uint32_t download_id,
-      DownloadUrlParameters* params);
+      DownloadUrlParameters* params,
+      const net::NetworkTrafficAnnotationTag& traffic_annotation);
 
   // Size of the buffer used between the DownloadRequestCore and the
   // downstream receiver of its output.