Implement the ServiceWorkerRegistration.showNotification() method.

Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp

Index: Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
diff --git a/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp b/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ce61ae67fc88484b98092d2f13fd1d3ecfdeda2f
--- /dev/null
+++ b/Source/modules/notifications/ServiceWorkerRegistrationNotifications.cpp
@@ -0,0 +1,32 @@
+// 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 "config.h"
+#include "modules/notifications/ServiceWorkerRegistrationNotifications.h"
+
+#include "core/dom/DOMException.h"
+#include "core/dom/ExceptionCode.h"
+#include "core/dom/ExecutionContext.h"
+#include "modules/notifications/NotificationOptions.h"
+#include "platform/weborigin/KURL.h"
+#include "public/platform/WebNotificationData.h"
+
+namespace blink {
+
+ScriptPromise ServiceWorkerRegistrationNotifications::showNotification(ScriptState* scriptState, ServiceWorkerRegistration& serviceWorkerRegistration, const String& title, const NotificationOptions& options)
+{
+    KURL iconUrl;
+    if (options.hasIcon() && !options.icon().isEmpty()) {
+        iconUrl = scriptState->executionContext()->completeURL(options.icon());
+        if (!iconUrl.isValid())
+            iconUrl = KURL();
+    }
+
+    WebNotificationData notification(title, WebNotificationData::DirectionLeftToRight, options.lang(), options.body(), options.tag(), iconUrl);
+
+    // FIXME: Hook this up with the Blink API once it's been implemented.
+    return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError, "showNotification is not implemented yet."));
+}
+
+} // namespace blink