Refactoring DownloadManager::DownloadURL to add proper annotation.

components/download/internal/test/test_download_driver.h

Index: components/download/internal/test/test_download_driver.h
diff --git a/components/download/internal/test/test_download_driver.h b/components/download/internal/test/test_download_driver.h
index 0ee9f3d4642053855b92990e7604e07e24426407..c3094ad6d3b97cb5c2042000dd7dd792ec1746ac 100644
--- a/components/download/internal/test/test_download_driver.h
+++ b/components/download/internal/test/test_download_driver.h
@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "components/download/internal/download_driver.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 
 namespace download {
 
@@ -32,7 +33,9 @@ class TestDownloadDriver : public DownloadDriver {
   // DownloadDriver implementation.
   void Initialize(DownloadDriver::Client* client) override;
   bool IsReady() const override;
-  void Start(const DownloadParams& params) override;
+  void Start(
+      const DownloadParams& params,
+      const net::NetworkTrafficAnnotationTag& traffic_annotation) override;
   void Cancel(const std::string& guid) override;
   void Pause(const std::string& guid) override;
   void Resume(const std::string& guid) override;