Implement support for link type serviceworker in link elements.

third_party/WebKit/Source/core/html/LinkServiceWorker.cpp

+// Copyright 2016 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 "core/html/LinkServiceWorker.h"
+
+#include "core/dom/Document.h"
+#include "core/frame/LocalFrame.h"
+#include "core/html/HTMLLinkElement.h"
+#include "core/loader/FrameLoaderClient.h"
+
+namespace blink {
+
+PassOwnPtrWillBeRawPtr<LinkServiceWorker> LinkServiceWorker::create(HTMLLinkElement* owner)
+{
+    return adoptPtrWillBeNoop(new LinkServiceWorker(owner));
+}
+
+LinkServiceWorker::~LinkServiceWorker()
+{
+}
+
+void LinkServiceWorker::process()
+{
+    if (!m_owner || !m_owner->document().frame())
+        return;
+
+    m_owner->document().frame()->loader().client()->registerServiceWorker(m_owner->href(), m_owner->scope(), m_owner);
+}
+
+bool LinkServiceWorker::hasLoaded() const
+{
+    return false;
+}
+
+void LinkServiceWorker::ownerRemoved()
+{
+    process();
+}
+
+LinkServiceWorker::LinkServiceWorker(HTMLLinkElement* owner)
+    : LinkResource(owner)
+{
+}
+
+} // namespace blink