initial version of the headless download manager delegate

headless/lib/browser/headless_devtools_manager_delegate.h

Index: headless/lib/browser/headless_devtools_manager_delegate.h
diff --git a/headless/lib/browser/headless_devtools_manager_delegate.h b/headless/lib/browser/headless_devtools_manager_delegate.h
index a51254746268545f91429d860d678d4f166a000a..da9b54bf4b1507f80064efefa9f28e922d5f3121 100644
--- a/headless/lib/browser/headless_devtools_manager_delegate.h
+++ b/headless/lib/browser/headless_devtools_manager_delegate.h
@@ -62,6 +62,13 @@ class HeadlessDevToolsManagerDelegate
   std::unique_ptr<base::DictionaryValue> DisposeBrowserContext(
       int command_id,
       const base::DictionaryValue* params);
+  std::unique_ptr<base::DictionaryValue> SetDownloadBehavior(
+      int command_id,
+      const base::DictionaryValue* params);
+  std::unique_ptr<base::DictionaryValue> SetDownloadDirectory(
+      int command_id,
+      const base::DictionaryValue* params);
+
   void PrintToPDF(content::DevToolsAgentHost* agent_host,
                   int command_id,
                   const base::DictionaryValue* params,