A crazy experiment to figure out what test actually checks to see if this is there.

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index e24d104958ac5e423bed4d270eb2d801d205759b..2ce5214d9c723adb96b6193d72534321fde1b73e 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3510,7 +3510,7 @@ void RenderFrameImpl::didNavigateWithinPage(blink::WebLocalFrame* frame,
   // UpdateNavigationState conveniently takes care of this for us.
   DocumentState* document_state =
       DocumentState::FromDataSource(frame->dataSource());
-  UpdateNavigationState(document_state, true /* was_within_same_page */);
+  // UpdateNavigationState(document_state, true /* was_within_same_page */);
   static_cast<NavigationStateImpl*>(document_state->navigation_state())
       ->set_was_within_same_page(true);