import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/performance/PerformanceMeasure.h

@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef mozilla_dom_performancemeasure_h___
+#define mozilla_dom_performancemeasure_h___
+
+#include "mozilla/dom/PerformanceEntry.h"
+
+namespace mozilla {
+namespace dom {
+
+// http://www.w3.org/TR/user-timing/#performancemeasure
+class PerformanceMeasure final : public PerformanceEntry
+{
+public:
+  PerformanceMeasure(nsISupports* aParent,
+                     const nsAString& aName,
+                     DOMHighResTimeStamp aStartTime,
+                     DOMHighResTimeStamp aEndTime);
+
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  virtual DOMHighResTimeStamp StartTime() const override
+  {
+    return mStartTime;
+  }
+
+  virtual DOMHighResTimeStamp Duration() const override
+  {
+    return mDuration;
+  }
+
+protected:
+  virtual ~PerformanceMeasure();
+  DOMHighResTimeStamp mStartTime;
+  DOMHighResTimeStamp mDuration;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif /* mozilla_dom_performancemeasure_h___ */