Usecounter added for counting usage of addEventListener for PointerEvents.

third_party/WebKit/Source/core/events/EventUtil.cpp

+// Copyright 2016 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 "core/events/EventUtil.h"
+
+#include "core/EventTypeNames.h"
+
+namespace blink {
+
+namespace EventUtil {
+
+bool isPointerEventType(const AtomicString& eventType)
+{
+return eventType == EventTypeNames::gotpointercapture
+    || eventType == EventTypeNames::lostpointercapture
+    || eventType == EventTypeNames::pointercancel
+    || eventType == EventTypeNames::pointerdown
+    || eventType == EventTypeNames::pointerenter
+    || eventType == EventTypeNames::pointerleave
+    || eventType == EventTypeNames::pointermove
+    || eventType == EventTypeNames::pointerout
+    || eventType == EventTypeNames::pointerover
+    || eventType == EventTypeNames::pointerup;
+}
+
+} // namespace eventUtil
+
+} // namespace blink
+
+