Introduce the Blink NotificationService, move permission checks there

third_party/WebKit/Source/modules/notifications/NotificationManager.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 "modules/notifications/NotificationManager.h"
+
+#include "platform/weborigin/SecurityOrigin.h"
+#include "public/platform/Platform.h"
+#include "public/platform/ServiceRegistry.h"
+#include "public/platform/modules/permissions/permission_status.mojom-blink.h"
+
+namespace blink {
+
+// static
+NotificationManager* NotificationManager::from(ExecutionContext* executionContext)
+{
+    DCHECK(executionContext);
+    DCHECK(executionContext->isContextThread());
+
+    NotificationManager* manager = static_cast<NotificationManager*>(Supplement<ExecutionContext>::from(executionContext, supplementName()));
+    if (!manager) {
+        manager = new NotificationManager(executionContext);
+        Supplement<ExecutionContext>::provideTo(*executionContext, supplementName(), manager);
+    }
+
+    return manager;
+}
+
+// static
+const char* NotificationManager::supplementName()
+{
+    return "NotificationManager";
+}
+
+NotificationManager::NotificationManager(ExecutionContext* executionContext)
+    : ContextLifecycleObserver(executionContext)
+{
+    Platform::current()->serviceRegistry()->connectToRemoteService(mojo::GetProxy(&m_service));
+}
+
+NotificationManager::~NotificationManager()
+{
+}
+
+mojom::blink::PermissionStatus NotificationManager::permissionStatus() const
+{
+    mojom::blink::PermissionStatus permissionStatus;
+
+    const bool result =
+        m_service->GetPermissionStatus(getExecutionContext()->getSecurityOrigin()->toString(), &permissionStatus);
+    DCHECK(result);
+
+    return permissionStatus;
+}
+
+void NotificationManager::contextDestroyed()
+{
+    m_service.reset();
+}
+
+DEFINE_TRACE(NotificationManager)
+{
+    ContextLifecycleObserver::trace(visitor);
+    Supplement<ExecutionContext>::trace(visitor);
+}
+
+} // namespace blink