[extension SW]: Support event listener registration and event dispatching.

extensions/renderer/service_worker_request_sender.h

Index: extensions/renderer/service_worker_request_sender.h
diff --git a/extensions/renderer/service_worker_request_sender.h b/extensions/renderer/service_worker_request_sender.h
index 0493f617a5b25357a26271286e090d217467e236..ff509ba3beadcf1618cd9bdd5408c8d9579e6ed7 100644
--- a/extensions/renderer/service_worker_request_sender.h
+++ b/extensions/renderer/service_worker_request_sender.h
@@ -6,6 +6,7 @@
 #define EXTENSIONS_RENDERER_SERVICE_WORKER_REQUEST_SENDER_H_
 
 #include "extensions/renderer/request_sender.h"
+#include "ipc/ipc_message.h"
 
 namespace extensions {
 class WorkerThreadDispatcher;
@@ -26,6 +27,8 @@ class ServiceWorkerRequestSender : public RequestSender {
                             const base::ListValue& response,
                             const std::string& error);
 
+  void SendIPC(IPC::Message* ipc);
+
  private:
   WorkerThreadDispatcher* const dispatcher_;
   const int64_t service_worker_version_id_;