refactor: EventEmitters without gin_helper (#22726)

shell/browser/api/electron_api_event_emitter.h

@@ -0,0 +1,21 @@
+// Copyright (c) 2019 Slack Technologies, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_BROWSER_API_ELECTRON_API_EVENT_EMITTER_H_
+#define SHELL_BROWSER_API_ELECTRON_API_EVENT_EMITTER_H_
+
+namespace v8 {
+template <typename T>
+class Local;
+class Object;
+class Isolate;
+}  // namespace v8
+
+namespace electron {
+
+v8::Local<v8::Object> GetEventEmitterPrototype(v8::Isolate* isolate);
+
+}  // namespace electron
+
+#endif  // SHELL_BROWSER_API_ELECTRON_API_EVENT_EMITTER_H_