Simplify permission-related code for Web Notifications.

chrome/browser/notifications/desktop_notification_service.h

 // Copyright (c) 2012 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_DESKTOP_NOTIFICATION_SERVICE_H_
 #define CHROME_BROWSER_NOTIFICATIONS_DESKTOP_NOTIFICATION_SERVICE_H_
 
 #include <set>
 #include <string>
-#include <vector>
 
 #include "base/basictypes.h"
-#include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
 #include "base/prefs/pref_member.h"
 #include "base/scoped_observer.h"
-#include "base/strings/string16.h"
-#include "chrome/browser/content_settings/permission_context_base.h"
-#include "components/content_settings/core/common/content_settings.h"
 #include "components/keyed_service/core/keyed_service.h"
 #include "ui/message_center/notifier_settings.h"
-#include "url/gurl.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "extensions/browser/extension_registry_observer.h"
 #endif
 
 class Profile;
 
 #if defined(ENABLE_EXTENSIONS)
 namespace extensions {
 class ExtensionRegistry;
 }
 #endif
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 // The DesktopNotificationService is an object, owned by the Profile,
 // which provides the creation of desktop "toasts" to web pages and workers.
-class DesktopNotificationService : public PermissionContextBase
+class DesktopNotificationService : public KeyedService
 #if defined(ENABLE_EXTENSIONS)
-                                   ,
-                                   public extensions::ExtensionRegistryObserver
+                                 , public extensions::ExtensionRegistryObserver
 #endif
                                    {
  public:
   // Register profile-specific prefs of notifications.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* prefs);
 
   explicit DesktopNotificationService(Profile* profile);
   ~DesktopNotificationService() override;
 
-  // Requests Web Notification permission for |requesting_frame|. The |callback|
-  // will be invoked after the user has made a decision.
-  void RequestNotificationPermission(
-      content::WebContents* web_contents,
-      const PermissionRequestID& request_id,
-      const GURL& requesting_origin,
-      bool user_gesture,
-      const BrowserPermissionCallback& result_callback);
-
   // Returns true if the notifier with |notifier_id| is allowed to send
   // notifications.
   bool IsNotifierEnabled(const message_center::NotifierId& notifier_id) const;
 
   // Updates the availability of the notifier.
   void SetNotifierEnabled(const message_center::NotifierId& notifier_id,
                           bool enabled);
 
  private:
   // Called when the string list pref has been changed.
   void OnStringListPrefChanged(
       const char* pref_name, std::set<std::string>* ids_field);
 
   // Called when the disabled_extension_id pref has been changed.
   void OnDisabledExtensionIdsChanged();
 
   void FirePermissionLevelChangedEvent(
       const message_center::NotifierId& notifier_id,
       bool enabled);
 
 #if defined(ENABLE_EXTENSIONS)
   // extensions::ExtensionRegistryObserver:
   void OnExtensionUninstalled(content::BrowserContext* browser_context,
                               const extensions::Extension* extension,
                               extensions::UninstallReason reason) override;
 #endif
 
-  // PermissionContextBase:
-  void UpdateContentSetting(const GURL& requesting_origin,
-                            const GURL& embedder_origin,
-                            ContentSetting content_setting) override;
-  bool IsRestrictedToSecureOrigins() const override;
-
   // The profile which owns this object.
   Profile* profile_;
 
   // Prefs listener for disabled_extension_id.
   StringListPrefMember disabled_extension_id_pref_;
 
   // Prefs listener for disabled_system_component_id.
   StringListPrefMember disabled_system_component_id_pref_;
 
   // On-memory data for the availability of extensions.
   std::set<std::string> disabled_extension_ids_;
 
   // On-memory data for the availability of system_component.
   std::set<std::string> disabled_system_component_ids_;
 
 #if defined(ENABLE_EXTENSIONS)
   // An observer to listen when extension is uninstalled.
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(DesktopNotificationService);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_DESKTOP_NOTIFICATION_SERVICE_H_