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

content/public/browser/push_messaging_service.h

Index: content/public/browser/push_messaging_service.h
diff --git a/content/public/browser/push_messaging_service.h b/content/public/browser/push_messaging_service.h
index 4d06cdde2c1ea99adff2acc7adc2f7a3fbcbf60e..33d47e69fb11238aa9c5790e49d01330b7c782b9 100644
--- a/content/public/browser/push_messaging_service.h
+++ b/content/public/browser/push_messaging_service.h
@@ -15,6 +15,7 @@
 
 namespace content {
 
+class BrowserContext;
 class ServiceWorkerContext;
 
 // A push service-agnostic interface that the Push API uses for talking to
@@ -32,21 +33,6 @@ class CONTENT_EXPORT PushMessagingService {
                           PushRegistrationStatus /* status */)>;
   using UnregisterCallback = base::Callback<void(PushUnregistrationStatus)>;
 
-  // Provide a storage mechanism to read/write an opaque
-  // "notifications_shown_by_last_few_pushes" string associated with a Service
-  // Worker registration. Stored data is deleted when the associated
-  // registration is deleted.
-  static void GetNotificationsShownByLastFewPushes(
-      ServiceWorkerContext* service_worker_context,
-      int64 service_worker_registration_id,
-      const GetNotificationsShownCallback& callback);
-  static void SetNotificationsShownByLastFewPushes(
-      ServiceWorkerContext* service_worker_context,
-      int64 service_worker_registration_id,
-      const GURL& origin,
-      const std::string& notifications_shown,
-      const ResultCallback& callback);
-
   virtual ~PushMessagingService() {}
 
   // Returns the absolute URL exposed by the push server where the webapp server
@@ -86,6 +72,28 @@ class CONTENT_EXPORT PushMessagingService {
   virtual blink::WebPushPermissionStatus GetPermissionStatus(
       const GURL& requesting_origin,
       const GURL& embedding_origin) = 0;
+
+ protected:
+  // Provide a storage mechanism to read/write an opaque
+  // "notifications_shown_by_last_few_pushes" string associated with a Service
+  // Worker registration. Stored data is deleted when the associated
+  // registration is deleted.
+  static void GetNotificationsShownByLastFewPushes(
+      ServiceWorkerContext* service_worker_context,
+      int64 service_worker_registration_id,
+      const GetNotificationsShownCallback& callback);
+  static void SetNotificationsShownByLastFewPushes(
+      ServiceWorkerContext* service_worker_context,
+      int64 service_worker_registration_id,
+      const GURL& origin,
+      const std::string& notifications_shown,
+      const ResultCallback& callback);
+
+  // Clear the push registration id stored in the service worker with the given
+  // |service_worker_registration_id| for the given |origin|.
+  static void ClearPushRegistrationID(BrowserContext* browser_context,
+                                      const GURL& origin,
+                                      int64 service_worker_registration_id);
 };
 
 }  // namespace content