Add time stamp to the constructor of the events

third_party/WebKit/Source/core/events/PointerEvent.h

 // Copyright 2015 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.
 
 #ifndef PointerEvent_h
 #define PointerEvent_h
 
 #include "core/events/MouseEvent.h"
 #include "core/events/PointerEventInit.h"
 
 namespace blink {
 
 class CORE_EXPORT PointerEvent final : public MouseEvent {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
-  static PointerEvent* Create(const AtomicString& type,
-                              const PointerEventInit& initializer) {
-    return new PointerEvent(type, initializer);
+  static PointerEvent* Create(
+      const AtomicString& type,
+      const PointerEventInit& initializer,
+      TimeTicks platform_time_stamp = TimeTicks::Now()) {
+    return new PointerEvent(type, initializer, platform_time_stamp);
   }
 
   int pointerId() const { return pointer_id_; }
   double width() const { return width_; }
   double height() const { return height_; }
   float pressure() const { return pressure_; }
   long tiltX() const { return tilt_x_; }
   long tiltY() const { return tilt_y_; }
   float tangentialPressure() const { return tangential_pressure_; }
   long twist() const { return twist_; }
   const String& pointerType() const { return pointer_type_; }
   bool isPrimary() const { return is_primary_; }
 
   short button() const override { return RawButton(); }
   bool IsMouseEvent() const override;
   bool IsPointerEvent() const override;
 
   EventDispatchMediator* CreateMediator() override;
 
   HeapVector<Member<PointerEvent>> getCoalescedEvents() const;
 
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  PointerEvent(const AtomicString&, const PointerEventInit&);
+  PointerEvent(const AtomicString&,
+               const PointerEventInit&,
+               TimeTicks platform_time_stamp);
 
   int pointer_id_;
   double width_;
   double height_;
   float pressure_;
   long tilt_x_;
   long tilt_y_;
   float tangential_pressure_;
   long twist_;
   String pointer_type_;
@@ skipping 10 matching lines @@
   explicit PointerEventDispatchMediator(PointerEvent*);
   PointerEvent& Event() const;
   DispatchEventResult DispatchEvent(EventDispatcher&) const override;
 };
 
 DEFINE_EVENT_TYPE_CASTS(PointerEvent);
 
 }  // namespace blink
 
 #endif  // PointerEvent_h