Fix aborted navigates not clearing the pending navigation entry with PlzNavigate.

content/browser/frame_host/navigation_request.cc

Index: content/browser/frame_host/navigation_request.cc
diff --git a/content/browser/frame_host/navigation_request.cc b/content/browser/frame_host/navigation_request.cc
index 0c6494043863b5c8aaadac1ca800c736a796cbc7..dc9769495d844070840d8b94635bc6f48134a8e4 100644
--- a/content/browser/frame_host/navigation_request.cc
+++ b/content/browser/frame_host/navigation_request.cc
@@ -357,6 +357,8 @@ void NavigationRequest::OnResponseStarted(
   if (response->head.headers.get() &&
       (response->head.headers->response_code() == 204 ||
        response->head.headers->response_code() == 205)) {
+    frame_tree_node_->navigator()->DiscardPendingEntryIfNeeded(
+        navigation_handle_.get());
     frame_tree_node_->ResetNavigationRequest(false);
     return;
   }