Introduce the Blink NotificationService, move permission checks there

third_party/WebKit/Source/modules/notifications/NotificationManager.h

+// 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.
+
+#ifndef NotificationManager_h
+#define NotificationManager_h
+
+#include "core/dom/ContextLifecycleObserver.h"
+#include "core/dom/ExecutionContext.h"
+#include "public/platform/modules/notifications/notification_service.mojom-blink.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+namespace mojom {
+enum class PermissionStatus;
+}
+
+// The notification manager, unique to the execution context, is responsible for
+// connecting and communicating with the Mojo notification service.
+//
+// TODO(peter): Make the NotificationManager responsible for resource loading.
+class NotificationManager final
+    : public GarbageCollectedFinalized<NotificationManager>
+    , public ContextLifecycleObserver
+    , public Supplement<ExecutionContext> {
+    USING_GARBAGE_COLLECTED_MIXIN(NotificationManager);
+    WTF_MAKE_NONCOPYABLE(NotificationManager);
+public:
+    static NotificationManager* from(ExecutionContext*);
+    static const char* supplementName();
+
+    ~NotificationManager();
+
+    // Returns the notification permission status of the current origin. This
+    // method is synchronous to support the Notification.permission getter.
+    mojom::PermissionStatus permissionStatus() const;
+
+    // ContextLifecycleObserver implementation.
+    void contextDestroyed() override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    explicit NotificationManager(ExecutionContext*);
+
+    // Returns a string containing the security origin of the execution
+    // context this NotificationManager has been associated with.
+    String getOriginString() const;
+
+    mojom::blink::NotificationServicePtr m_service;
+};
+
+} // namespace blink
+
+#endif // NotificationManager_h