Add time stamp to the constructor of the events

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

Index: third_party/WebKit/Source/core/events/PointerEvent.h
diff --git a/third_party/WebKit/Source/core/events/PointerEvent.h b/third_party/WebKit/Source/core/events/PointerEvent.h
index 234a33cb98bd27d1bb7a9e62426ad4dd263b9fec..2e888994d4e3e11918484e2a325cc06e00961b98 100644
--- a/third_party/WebKit/Source/core/events/PointerEvent.h
+++ b/third_party/WebKit/Source/core/events/PointerEvent.h
@@ -14,9 +14,11 @@ 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_; }
@@ -41,7 +43,9 @@ class CORE_EXPORT PointerEvent final : public MouseEvent {
   DECLARE_VIRTUAL_TRACE();
 
  private:
-  PointerEvent(const AtomicString&, const PointerEventInit&);
+  PointerEvent(const AtomicString&,
+               const PointerEventInit&,
+               TimeTicks platform_time_stamp);
 
   int pointer_id_;
   double width_;