import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/performance/PerformanceMark.cpp

@@ -0,0 +1,31 @@
+/* -*- 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/. */
+
+#include "PerformanceMark.h"
+#include "MainThreadUtils.h"
+#include "mozilla/dom/PerformanceMarkBinding.h"
+
+using namespace mozilla::dom;
+
+PerformanceMark::PerformanceMark(nsISupports* aParent,
+                                 const nsAString& aName,
+                                 DOMHighResTimeStamp aStartTime)
+  : PerformanceEntry(aParent, aName, NS_LITERAL_STRING("mark"))
+  , mStartTime(aStartTime)
+{
+  // mParent is null in workers.
+  MOZ_ASSERT(mParent || !NS_IsMainThread());
+}
+
+PerformanceMark::~PerformanceMark()
+{
+}
+
+JSObject*
+PerformanceMark::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return PerformanceMarkBinding::Wrap(aCx, this, aGivenProto);
+}