PlzNavigate: Show error pages when the navigation failed before commit

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 9ac9b8d174fe3f6526c1a990b151c691493335af..013df0a8207f44bc56b31bff9bd735d80328f351 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -422,6 +422,14 @@ class CONTENT_EXPORT RenderFrameHostImpl
                         const CommonNavigationParams& common_params,
                         const RequestNavigationParams& request_params);
 
+  // PlzNavigate
+  // Indicates that a navigation failed and that this RenderFrame should display
+  // an error page.
+  void FailedNavigation(const CommonNavigationParams& common_params,
+                        const RequestNavigationParams& request_params,
+                        bool has_stale_copy_in_cache,
+                        int error_code);
+
   // Sets up the Mojo connection between this instance and its associated render
   // frame if it has not yet been set up.
   void SetUpMojoIfNeeded();