Do not delete notification ids unknown by the display service

content/shell/browser/layout_test/layout_test_permission_manager.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/browser/layout_test/layout_test_permission_manager.h"
 
 #include <list>
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/permission_type.h"
 #include "content/public/browser/web_contents.h"
 #include "content/shell/browser/layout_test/layout_test_content_browser_client.h"
+#include "content/shell/browser/layout_test/layout_test_notification_manager.h"
 
 namespace content {
 
 struct LayoutTestPermissionManager::Subscription {
   PermissionDescription permission;
   base::Callback<void(blink::mojom::PermissionStatus)> callback;
   blink::mojom::PermissionStatus current_value;
 };
 
 LayoutTestPermissionManager::PermissionDescription::PermissionDescription(
@@ skipping 183 matching lines @@
     // Add the callback to |callbacks| which will be run after the loop to
     // prevent re-entrance issues.
     callbacks.push_back(base::Bind(subscription->callback, status));
   }
 
   for (const auto& callback : callbacks)
     callback.Run();
 }
 
 }  // namespace content