Disable Notifications in Incognito

chrome/browser/notifications/incognito_denied_infobar_delegate.h

+// Copyright 2015 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 CHROME_BROWSER_NOTIFICATIONS_INCOGNITO_DENIED_INFOBAR_DELEGATE_H_
+#define CHROME_BROWSER_NOTIFICATIONS_INCOGNITO_DENIED_INFOBAR_DELEGATE_H_
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "components/infobars/core/confirm_infobar_delegate.h"
+
+class InfoBarService;
+class NavigationDetails;
+
+// Specialised infobar that informs the user that notifications permission is
+// not supported in incognito, then marks the permission as denied when the user
+// dismisses the infobar. Together with the fact that notification permission
+// grants are (unusually) not inherited from regular to incognito profiles
+// (blocks are still inherited), this prevents websites from detecting whether
+// the user is using incognito, even though notifications are completely
+// disabled in incognito.
+// TODO(johnme): Consider auto-dismissing the infobar after a timeout that is
+// normally-distributed, to reduce user annoyance without revealing incognito.
+class IncognitoDeniedInfobarDelegate : public ConfirmInfoBarDelegate {
+ public:
+  // Creates the infobar and delegate and adds the infobar to |infobar_service|.
+  // Returns the infobar if it was successfully added.
+  static infobars::InfoBar* Create(
+      InfoBarService* infobar_service,
+      const GURL& requesting_origin,
+      const std::string& display_languages,
+      const base::Closure& dismiss_callback);
+
+ private:
+  IncognitoDeniedInfobarDelegate(const GURL& requesting_origin,
+                                 const std::string& display_languages,
+                                 const base::Closure& dismiss_callback);
+  ~IncognitoDeniedInfobarDelegate() override;
+
+  // ConfirmInfoBarDelegate:
+  Type GetInfoBarType() const override;
+  int GetIconId() const override;
+  base::string16 GetMessageText() const override;
+  int GetButtons() const override;
+  void InfoBarDismissed() override;
+
+  GURL requesting_origin_;
+  std::string display_languages_;
+  base::Closure callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(IncognitoDeniedInfobarDelegate);
+};
+
+#endif  // CHROME_BROWSER_NOTIFICATIONS_INCOGNITO_DENIED_INFOBAR_DELEGATE_H_