[Extensions Bindings] Request JS execution from messaging bindings

extensions/renderer/js_extension_bindings_system.cc

Index: extensions/renderer/js_extension_bindings_system.cc
diff --git a/extensions/renderer/js_extension_bindings_system.cc b/extensions/renderer/js_extension_bindings_system.cc
index 45c3500c3cfa701d8bd613095346bbdee7a0289d..9f6957968ca823f1765dd2c59b3094c53501bd42 100644
--- a/extensions/renderer/js_extension_bindings_system.cc
+++ b/extensions/renderer/js_extension_bindings_system.cc
@@ -17,6 +17,7 @@
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/manifest_handlers/externally_connectable.h"
 #include "extensions/renderer/binding_generating_native_handler.h"
+#include "extensions/renderer/event_bindings.h"
 #include "extensions/renderer/renderer_extension_registry.h"
 #include "extensions/renderer/resource_bundle_source_map.h"
 #include "extensions/renderer/script_context.h"
@@ -272,6 +273,12 @@ void JsExtensionBindingsSystem::DispatchEventInContext(
       arguments.data());
 }
 
+bool JsExtensionBindingsSystem::HasEventListenerInContext(
+    const std::string& event_name,
+    ScriptContext* context) {
+  return EventBindings::HasListener(context, event_name);
+}
+
 void JsExtensionBindingsSystem::RegisterBinding(
     const std::string& api_name,
     const std::string& api_bind_name,