Add m-esr52 at 52.6.0

1 files changed, 23 insertions, 0 deletions

diff --git a/dom/webidl/PerformanceObserver.webidl b/dom/webidl/PerformanceObserver.webidl
new file mode 100644
index 000000000..a3a14cb1e
--- /dev/null
+++ b/dom/webidl/PerformanceObserver.webidl
@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * https://w3c.github.io/performance-timeline/#the-performanceobserver-interface
+ */
+
+dictionary PerformanceObserverInit {
+  required sequence<DOMString> entryTypes;
+};
+
+callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries, PerformanceObserver observer);
+
+[Func="Performance::IsObserverEnabled",
+ Constructor(PerformanceObserverCallback callback),
+ Exposed=(Window,Worker)]
+interface PerformanceObserver {
+  [Throws]
+  void observe(PerformanceObserverInit options);
+  void disconnect();
+};