Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

content/child/service_worker/web_service_worker_impl.cc

 // Copyright 2013 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/web_service_worker_impl.h"
 
 #include "content/child/thread_safe_sender.h"
 #include "content/child/webmessageportchannel_impl.h"
 #include "content/common/service_worker/service_worker_messages.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 
 using blink::WebMessagePortChannel;
 using blink::WebMessagePortChannelArray;
 using blink::WebMessagePortChannelClient;
 using blink::WebString;
 
 namespace content {
 
-WebServiceWorkerImpl::~WebServiceWorkerImpl() {}
+WebServiceWorkerImpl::WebServiceWorkerImpl(
+    int handle_id,
+    ThreadSafeSender* thread_safe_sender)
+    : handle_id_(handle_id),
+      thread_safe_sender_(thread_safe_sender) {}
+
+WebServiceWorkerImpl::~WebServiceWorkerImpl() {
+  thread_safe_sender_->Send(
+      new ServiceWorkerHostMsg_ServiceWorkerObjectDestroyed(handle_id_));
+}
 
 void WebServiceWorkerImpl::postMessage(const WebString& message,
                                        WebMessagePortChannelArray* channels) {
   thread_safe_sender_->Send(new ServiceWorkerHostMsg_PostMessage(
-      version_id_,
+      handle_id_,
       message,
       WebMessagePortChannelImpl::ExtractMessagePortIDs(channels)));
 }
 
 }  // namespace content