[Extensions Bindings] Introduce a supportsLazyListeners property

extensions/renderer/bindings/api_event_handler.h

Index: extensions/renderer/bindings/api_event_handler.h
diff --git a/extensions/renderer/bindings/api_event_handler.h b/extensions/renderer/bindings/api_event_handler.h
index bca7319ba7d3e201e45c1cc32bc67debfe17e5d9..36c3fb4e730e9332f75837911de84d321d617b17 100644
--- a/extensions/renderer/bindings/api_event_handler.h
+++ b/extensions/renderer/bindings/api_event_handler.h
@@ -35,7 +35,7 @@ class APIEventHandler {
       base::Callback<void(const std::string& event_name,
                           binding::EventListenersChanged,
                           const base::DictionaryValue* filter,
-                          bool was_manual,
+                          bool update_lazy_listeners,
                           v8::Local<v8::Context>)>;
 
   APIEventHandler(const binding::RunJSFunction& call_js,
@@ -45,8 +45,11 @@ class APIEventHandler {
 
   // Returns a new v8::Object for an event with the given |event_name|. If
   // |notify_on_change| is true, notifies whenever listeners state is changed.
+  // TODO(devlin): Maybe worth creating a Params struct to hold the event
+  // information?
   v8::Local<v8::Object> CreateEventInstance(const std::string& event_name,
                                             bool supports_filters,
+                                            bool supports_lazy_listeners,
                                             int max_listeners,
                                             bool notify_on_change,
                                             v8::Local<v8::Context> context);