Create NavigationHandles for interstitials if needed

content/browser/frame_host/navigator.cc

Index: content/browser/frame_host/navigator.cc
diff --git a/content/browser/frame_host/navigator.cc b/content/browser/frame_host/navigator.cc
index c16794bceae94bd8e6cde6c82abdb2530d01bf80..a70e81704ec46823b959c76c2961da828dadf75f 100644
--- a/content/browser/frame_host/navigator.cc
+++ b/content/browser/frame_host/navigator.cc
@@ -37,4 +37,9 @@ void Navigator::OnBeginNavigation(FrameTreeNode* frame_tree_node,
                                   const CommonNavigationParams& common_params,
                                   const BeginNavigationParams& begin_params) {}
 
+NavigationHandleImpl* Navigator::GetNavigationHandleForFrameHost(
+    RenderFrameHostImpl* render_frame_host) {
+  return nullptr;
+}
+
 }  // namespace content