fix: enable navigator.setAppBadge/clearAppBadge (#27067)

shell/browser/badging/badge_manager_factory.h

@@ -0,0 +1,44 @@
+// Copyright 2018 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 SHELL_BROWSER_BADGING_BADGE_MANAGER_FACTORY_H_
+#define SHELL_BROWSER_BADGING_BADGE_MANAGER_FACTORY_H_
+
+#include "base/macros.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}
+
+namespace badging {
+
+class BadgeManager;
+
+// Singleton that provides access to context specific BadgeManagers.
+class BadgeManagerFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  // Gets the BadgeManager for the specified context
+  static BadgeManager* GetForBrowserContext(content::BrowserContext* context);
+
+  // Returns the BadgeManagerFactory singleton.
+  static BadgeManagerFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<BadgeManagerFactory>;
+
+  BadgeManagerFactory();
+  ~BadgeManagerFactory() override;
+
+  // BrowserContextKeyedServiceFactory
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(BadgeManagerFactory);
+};
+
+}  // namespace badging
+
+#endif  // SHELL_BROWSER_BADGING_BADGE_MANAGER_FACTORY_H_