PlzNavigate: provide the FrameTreeNode ID to the network stack

content/browser/frame_host/navigation_request_info.h

Index: content/browser/frame_host/navigation_request_info.h
diff --git a/content/browser/frame_host/navigation_request_info.h b/content/browser/frame_host/navigation_request_info.h
index 2721c3d73ad539ee9b6afb1263abf8d426d943ae..c6bc6b6c8eec33d2473f2c65933b089391711ba9 100644
--- a/content/browser/frame_host/navigation_request_info.h
+++ b/content/browser/frame_host/navigation_request_info.h
@@ -27,6 +27,7 @@ struct CONTENT_EXPORT NavigationRequestInfo {
                         const GURL& first_party_for_cookies,
                         bool is_main_frame,
                         bool parent_is_main_frame,
+                        int frame_tree_node_id,
                         scoped_refptr<ResourceRequestBody> request_body);
   ~NavigationRequestInfo();
 
@@ -40,6 +41,8 @@ struct CONTENT_EXPORT NavigationRequestInfo {
   const bool is_main_frame;
   const bool parent_is_main_frame;
 
+  const int frame_tree_node_id;
+
   scoped_refptr<ResourceRequestBody> request_body;
 };