[Extensions Bindings] Apply per-context restrictions to events

extensions/renderer/api_binding.cc

Index: extensions/renderer/api_binding.cc
diff --git a/extensions/renderer/api_binding.cc b/extensions/renderer/api_binding.cc
index 8b36c2d70065f08b9f59583d39a90a8135fafa19..fc4da0c8ba41e18ddca45de6ea88cfc4e467c03a 100644
--- a/extensions/renderer/api_binding.cc
+++ b/extensions/renderer/api_binding.cc
@@ -311,6 +311,14 @@ v8::Local<v8::Object> APIBinding::CreateInstance(
       CHECK(success.FromJust());
     }
   }
+  for (const auto& event : events_) {
+    if (!is_available.Run(event->full_name)) {
+      v8::Maybe<bool> success = object->Delete(
+          context, gin::StringToSymbol(isolate, event->exposed_name));
+      CHECK(success.IsJust());
+      CHECK(success.FromJust());
+    }
+  }
 
   return object;
 }