diff -r 000000000000 -r 6474c204b198 dom/webidl/Performance.webidl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/webidl/Performance.webidl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+/* -*- 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
+ * http://www.w3.org/TR/hr-time/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+typedef double DOMHighResTimeStamp;
+typedef sequence <PerformanceEntry> PerformanceEntryList;
+
+interface Performance {
+  DOMHighResTimeStamp now();
+
+  [Constant]
+  readonly attribute PerformanceTiming timing;
+  [Constant]
+  readonly attribute PerformanceNavigation navigation;
+
+  jsonifier;
+};
+
+// http://www.w3c-test.org/webperf/specs/PerformanceTimeline/#sec-window.performance-attribute
+partial interface Performance {
+  [Pref="dom.enable_resource_timing"]
+  PerformanceEntryList getEntries();
+  [Pref="dom.enable_resource_timing"]
+  PerformanceEntryList getEntriesByType(DOMString entryType);
+  [Pref="dom.enable_resource_timing"]
+  PerformanceEntryList getEntriesByName(DOMString name, optional DOMString
+    entryType);
+};
+
+// http://w3c-test.org/webperf/specs/ResourceTiming/#extensions-performance-interface
+partial interface Performance {
+  [Pref="dom.enable_resource_timing"]
+  void clearResourceTimings();
+  [Pref="dom.enable_resource_timing"]
+  void setResourceTimingBufferSize(unsigned long maxSize);
+};