Retire NotificationInlineReplies runtime enabled flag.

NotificationInlineReplies shipped in M70.

BUG=834580

Change-Id: Ibed1612aae4c21a239e9328d7134cd75169c713a
Reviewed-on: https://chromium-review.googlesource.com/c/1323615Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606844}

third_party/blink/renderer/modules/notifications/notification_action.idl

@@ -4,15 +4,15 @@
 
 // https://notifications.spec.whatwg.org/#dictdef-notificationaction
 
-[RuntimeEnabled=NotificationInlineReplies] enum NotificationActionType {
+enum NotificationActionType {
     "button",
     "text"
 };
 
 dictionary NotificationAction {
-    [RuntimeEnabled=NotificationInlineReplies] NotificationActionType type = "button";
+    NotificationActionType type = "button";
     required DOMString action;
     required DOMString title;
     USVString icon;
-    [RuntimeEnabled=NotificationInlineReplies] DOMString? placeholder = null;
+    DOMString? placeholder = null;
 };

third_party/blink/renderer/modules/notifications/notification_event.idl

@@ -11,5 +11,5 @@
 ] interface NotificationEvent : ExtendableEvent {
     [ImplementedAs=getNotification] readonly attribute Notification notification;
     readonly attribute DOMString action;
-    [RuntimeEnabled=NotificationInlineReplies] readonly attribute DOMString? reply;
+    readonly attribute DOMString? reply;
 };

third_party/blink/renderer/modules/notifications/notification_event_init.idl

@@ -7,5 +7,5 @@
 dictionary NotificationEventInit : ExtendableEventInit {
     required Notification notification;
     DOMString action = "";
-    [RuntimeEnabled=NotificationInlineReplies] DOMString? reply = "";
+    DOMString? reply = "";
 };

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -824,10 +824,6 @@
       name: "NotificationContentImage",
       status: "test",
     },
-    {
-      name: "NotificationInlineReplies",
-      status: "stable",
-    },
     {
       name: "Notifications",
       status: "stable",