Implementation of renotify flag for Notifications.

content/public/common/platform_notification_data.h

Index: content/public/common/platform_notification_data.h
diff --git a/content/public/common/platform_notification_data.h b/content/public/common/platform_notification_data.h
index 65a8891caec3439a4410cc7c220bf1284076d03b..3262cada6ce3846a1799e35d8dcc27acb87bb2f2 100644
--- a/content/public/common/platform_notification_data.h
+++ b/content/public/common/platform_notification_data.h
@@ -78,6 +78,10 @@ struct CONTENT_EXPORT PlatformNotificationData {
   // be suppressed.
   bool silent = false;
 
+  // Whether default notification indicators (sound, vibration, light) should
+  // be played again if the notification is replacing an older notification.
+  bool renotify = false;
+
   // Whether the notification should remain onscreen indefinitely, rather than
   // being auto-minimized to the notification center (if allowed by platform).
   bool require_interaction = false;