Revert of Introduce the Blink NotificationService, move permission checks there

content/child/notifications/notification_manager.cc

Index: content/child/notifications/notification_manager.cc
diff --git a/content/child/notifications/notification_manager.cc b/content/child/notifications/notification_manager.cc
index ed5642482ca84a12b9d2d30dcc8baf9c40a8540d..e95e7a81e127207d6dd5f592dfec497a2d4b7f8b 100644
--- a/content/child/notifications/notification_manager.cc
+++ b/content/child/notifications/notification_manager.cc
@@ -209,6 +209,20 @@
   }
 }
 
+blink::mojom::blink::PermissionStatus NotificationManager::checkPermission(
+    const blink::WebSecurityOrigin& origin) {
+  blink::mojom::PermissionStatus permission_status =
+      blink::mojom::PermissionStatus::DENIED;
+
+  // TODO(mkwst): This is potentially doing the wrong thing with unique
+  // origins. Perhaps also 'file:', 'blob:' and 'filesystem:'. See
+  // https://crbug.com/490074 for detail.
+  thread_safe_sender_->Send(new PlatformNotificationHostMsg_CheckPermission(
+      blink::WebStringToGURL(origin.toString()), &permission_status));
+
+  return static_cast<blink::mojom::blink::PermissionStatus>(permission_status);
+}
+
 bool NotificationManager::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(NotificationManager, message)