Add DCHECK that Reload should never be called with ReloadType::NONE

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 0995603d0b485c4622a977ead8f9d04898f11ac0..7e04526e5894a53823c197cb54cff0163ebfacc4 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -297,6 +297,8 @@ void NavigationControllerImpl::Restore(
 
 void NavigationControllerImpl::Reload(ReloadType reload_type,
                                       bool check_for_repost) {
+  DCHECK_NE(ReloadType::NONE, reload_type);
+
   if (transient_entry_index_ != -1) {
     // If an interstitial is showing, treat a reload as a navigation to the
     // transient entry's URL.