Revert of ServiceWorker: Introduce SWMessageSender in order to mock IPC messaging

content/child/service_worker/service_worker_message_sender.cc

Index: content/child/service_worker/service_worker_message_sender.cc
diff --git a/content/child/service_worker/service_worker_message_sender.cc b/content/child/service_worker/service_worker_message_sender.cc
deleted file mode 100644
index 4602ff5c105ea24f453accdff4b8353e96daef60..0000000000000000000000000000000000000000
--- a/content/child/service_worker/service_worker_message_sender.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/child/service_worker/service_worker_message_sender.h"
-
-#include "content/child/thread_safe_sender.h"
-
-namespace content {
-
-ServiceWorkerMessageSender::ServiceWorkerMessageSender(
-    ThreadSafeSender* thread_safe_sender)
-    : thread_safe_sender_(thread_safe_sender) {
-}
-
-bool ServiceWorkerMessageSender::Send(IPC::Message* message) {
-  return thread_safe_sender_->Send(message);
-}
-
-ServiceWorkerMessageSender::~ServiceWorkerMessageSender() {
-}
-
-}  // namespace content