Unregister with push service and SW database when permission is lost.

chrome/browser/services/gcm/push_messaging_service_impl.h

 // 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 CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_
 #define CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
+#include "components/content_settings/core/browser/content_settings_observer.h"
 #include "components/gcm_driver/gcm_app_handler.h"
 #include "components/gcm_driver/gcm_client.h"
 #include "content/public/browser/push_messaging_service.h"
 #include "content/public/common/push_messaging_status.h"
 #include "third_party/WebKit/public/platform/modules/push_messaging/WebPushPermissionStatus.h"
 
 class Profile;
 
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
 
 namespace gcm {
 
 class GCMProfileService;
 class PushMessagingApplicationId;
 
 class PushMessagingServiceImpl : public content::PushMessagingService,
-                                 public GCMAppHandler {
+                                 public GCMAppHandler,
+                                 public content_settings::Observer {
  public:
   // Register profile-specific prefs for GCM.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
   // If any Service Workers are using push, starts GCM and adds an app handler.
   static void InitializeForProfile(Profile* profile);
 
   PushMessagingServiceImpl(GCMProfileService* gcm_profile_service,
                            Profile* profile);
   ~PushMessagingServiceImpl() override;
@@ skipping 27 matching lines @@
       const content::PushMessagingService::RegisterCallback& callback) override;
   void Unregister(
       const GURL& requesting_origin,
       int64 service_worker_registration_id,
       bool retry_on_failure,
       const content::PushMessagingService::UnregisterCallback&) override;
   blink::WebPushPermissionStatus GetPermissionStatus(
       const GURL& requesting_origin,
       const GURL& embedding_origin) override;
 
+  // content_settings::Observer implementation.
+  void OnContentSettingChanged(const ContentSettingsPattern& primary_pattern,
+                               const ContentSettingsPattern& secondary_pattern,
+                               ContentSettingsType content_type,
+                               std::string resource_identifier) override;
+
   void SetProfileForTesting(Profile* profile);
 
  private:
   // A registration is pending until it has succeeded or failed.
   void IncreasePushRegistrationCount(int add, bool is_pending);
   void DecreasePushRegistrationCount(int subtract, bool was_pending);
 
   void DeliverMessageCallback(const std::string& app_id_guid,
                               const GURL& requesting_origin,
                               int64 service_worker_registration_id,
@@ skipping 52 matching lines @@
   int pending_push_registration_count_;
 
   base::WeakPtrFactory<PushMessagingServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingServiceImpl);
 };
 
 }  // namespace gcm
 
 #endif  // CHROME_BROWSER_SERVICES_GCM_PUSH_MESSAGING_SERVICE_IMPL_H_