Stub implementation for PushRegistration.unregister().

Source/modules/push_messaging/PushRegistrationCallback.cpp

Index: Source/modules/push_messaging/PushRegistrationCallback.cpp
diff --git a/Source/modules/push_messaging/PushRegistrationCallback.cpp b/Source/modules/push_messaging/PushRegistrationCallback.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..b693ec4fd8226ee75c0803ce426c34263e292105
--- /dev/null
+++ b/Source/modules/push_messaging/PushRegistrationCallback.cpp
@@ -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 "config.h"
+#include "modules/push_messaging/PushRegistrationCallback.h"
+
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "modules/push_messaging/PushError.h"
+#include "modules/push_messaging/PushRegistration.h"
+#include "modules/serviceworkers/ServiceWorkerRegistration.h"
+
+namespace blink {
+
+PushRegistrationCallback::PushRegistrationCallback(PassRefPtr<ScriptPromiseResolver> resolver, ServiceWorkerRegistration* registration)
+    : m_resolver(resolver)
+    , m_registration(registration)
+{
+    ASSERT(m_resolver);
+    ASSERT(m_registration);
+}
+
+PushRegistrationCallback::~PushRegistrationCallback()
+{
+}
+
+void PushRegistrationCallback::onSuccess(WebPushRegistration* result)
+{
+    if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
+        PushRegistration::dispose(result);
+        return;
+    }
+    m_resolver->resolve(PushRegistration::take(m_resolver.get(), result, m_registration));
+}
+
+void PushRegistrationCallback::onError(WebPushError* error)
+{
+    if (!m_resolver->executionContext() || m_resolver->executionContext()->activeDOMObjectsAreStopped()) {
+        PushError::dispose(error);
+        return;
+    }
+    m_resolver->reject(PushError::take(m_resolver.get(), error));
+}
+
+void PushRegistrationCallback::trace(Visitor* visitor)
+{
+    visitor->trace(m_registration);
+}
+
+} // namespace blink