Add a function to add extra headers from NavigationThrottle

content/browser/loader/navigation_resource_handler.cc

Index: content/browser/loader/navigation_resource_handler.cc
diff --git a/content/browser/loader/navigation_resource_handler.cc b/content/browser/loader/navigation_resource_handler.cc
index 94e046dbf0c74bf8044e6cd93484c3cab38563fa..cc01ba055ae26df948042e3d57eee7b227d173aa 100644
--- a/content/browser/loader/navigation_resource_handler.cc
+++ b/content/browser/loader/navigation_resource_handler.cc
@@ -40,7 +40,10 @@ void NavigationResourceHandler::Cancel() {
   core_ = nullptr;
 }
 
-void NavigationResourceHandler::FollowRedirect() {
+void NavigationResourceHandler::FollowRedirect(
+    const std::vector<std::pair<std::string, std::string>>& extra_headers) {
+  for (auto header : extra_headers)
+    request()->SetExtraRequestHeaderByName(header.first, header.second, true);
   controller()->Resume();
 }