Added check for behavior feature existense

extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc

Index: extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
diff --git a/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc b/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
index ec44ed2d59528361fbc9ece39e0fe6e006bfacef..f7d5923a092432d8ab9aa538f37866f314197f2a 100644
--- a/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
+++ b/extensions/browser/guest_view/extensions_guest_view_manager_delegate.cc
@@ -67,7 +67,8 @@ bool ExtensionsGuestViewManagerDelegate::IsGuestAvailableToContext(
     GuestViewBase* guest) {
   const Feature* feature =
       FeatureProvider::GetAPIFeature(guest->GetAPINamespace());
-  CHECK(feature);
+  if (!feature)
+    return false;
 
   ProcessMap* process_map = ProcessMap::Get(context_);
   CHECK(process_map);