Revert of Remove content::NotificationPermissionDispatcher.

content/renderer/notification_permission_dispatcher.h

Index: content/renderer/notification_permission_dispatcher.h
diff --git a/content/renderer/notification_permission_dispatcher.h b/content/renderer/notification_permission_dispatcher.h
new file mode 100644
index 0000000000000000000000000000000000000000..8b1eb58adfafb09bd00e1381b9455740589c6a96
--- /dev/null
+++ b/content/renderer/notification_permission_dispatcher.h
@@ -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.
+
+#ifndef CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_
+#define CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "content/public/renderer/render_frame_observer.h"
+#include "third_party/WebKit/public/platform/modules/permissions/permission.mojom.h"
+
+namespace blink {
+class WebNotificationPermissionCallback;
+class WebSecurityOrigin;
+}
+
+namespace content {
+
+class RenderFrame;
+
+// Dispatcher for Web Notification permission requests.
+class NotificationPermissionDispatcher : public RenderFrameObserver {
+ public:
+  explicit NotificationPermissionDispatcher(RenderFrame* render_frame);
+  ~NotificationPermissionDispatcher() override;
+
+  // Requests permission to display Web Notifications for |origin|. The callback
+  // will be invoked when the permission status is available. This class will
+  // take ownership of |callback|.
+  void RequestPermission(const blink::WebSecurityOrigin& origin,
+                         blink::WebNotificationPermissionCallback* callback);
+
+ private:
+  // RenderFrameObserver implementation.
+  void OnDestruct() override;
+
+  void OnPermissionRequestComplete(
+      std::unique_ptr<blink::WebNotificationPermissionCallback> callback,
+      blink::mojom::PermissionStatus status);
+
+  blink::mojom::PermissionServicePtr permission_service_;
+
+  DISALLOW_COPY_AND_ASSIGN(NotificationPermissionDispatcher);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_NOTIFICATION_PERMISSION_DISPATCHER_H_