Populate .current when navigator.serviceWorker is accessed

content/child/service_worker/scoped_service_worker_reference.cc

Index: content/child/service_worker/scoped_service_worker_reference.cc
diff --git a/content/child/service_worker/scoped_service_worker_reference.cc b/content/child/service_worker/scoped_service_worker_reference.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0f626782fc75425eb5fb19cc5e9d83eeadb69fe5
--- /dev/null
+++ b/content/child/service_worker/scoped_service_worker_reference.cc
@@ -0,0 +1,50 @@
+// Copyright 2014 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/scoped_service_worker_reference.h"
+
+#include "content/child/thread_safe_sender.h"
+#include "content/common/service_worker/service_worker_messages.h"
+
+namespace content {
+
+scoped_ptr<ScopedServiceWorkerReference>
+ScopedServiceWorkerReference::Create(
+    const ServiceWorkerObjectInfo& info,
+    ThreadSafeSender* sender) {
+  DCHECK(sender);
+  return make_scoped_ptr(new ScopedServiceWorkerReference(info, sender, true));
+}
+
+scoped_ptr<ScopedServiceWorkerReference>
+ScopedServiceWorkerReference::CreateForDeleter(
+    const ServiceWorkerObjectInfo& info,
+    ThreadSafeSender* sender) {
+  DCHECK(sender);
+  return make_scoped_ptr(new ScopedServiceWorkerReference(info, sender, false));
+}
+
+ScopedServiceWorkerReference::ScopedServiceWorkerReference(
+    const ServiceWorkerObjectInfo& info,
+    ThreadSafeSender* sender,
+    bool increment_ref_in_ctor)
+    : info_(info),
+      sender_(sender) {
+  if (increment_ref_in_ctor &&
+      info_.handle_id != kInvalidServiceWorkerHandleId) {
+    sender_->Send(
+        new ServiceWorkerHostMsg_IncrementServiceWorkerRefCount(
+            info_.handle_id));
+  }
+}
+
+ScopedServiceWorkerReference::~ScopedServiceWorkerReference() {
+  if (info_.handle_id != kInvalidServiceWorkerHandleId) {
+    sender_->Send(
+        new ServiceWorkerHostMsg_DecrementServiceWorkerRefCount(
+            info_.handle_id));
+  }
+}
+
+}  // namespace content