Store serialized notification data as an Intent extra on Android.

chrome/browser/notifications/persistent_notification_delegate.h

Index: chrome/browser/notifications/persistent_notification_delegate.h
diff --git a/chrome/browser/notifications/persistent_notification_delegate.h b/chrome/browser/notifications/persistent_notification_delegate.h
index a846280e44dc18911bcd2e9bdb84df2aaab886ec..28e9420051033cee3040385fbb8d80bdf29b4b0d 100644
--- a/chrome/browser/notifications/persistent_notification_delegate.h
+++ b/chrome/browser/notifications/persistent_notification_delegate.h
@@ -26,6 +26,14 @@ class PersistentNotificationDelegate : public NotificationDelegate {
       const GURL& origin,
       const content::PlatformNotificationData& notification_data);
 
+  int64 service_worker_registration_id() const {
+    return service_worker_registration_id_;
+  }
+
+  const content::PlatformNotificationData& notification_data() const {
+    return notification_data_;
+  }
+
   // NotificationDelegate implementation.
   void Display() override;
   void Close(bool by_user) override;