Add time stamp to the constructor of the events

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

 /*
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 57 matching lines @@
 
   UIEventWithKeyState(const AtomicString& type,
                       bool can_bubble,
                       bool cancelable,
                       AbstractView*,
                       int detail,
                       WebInputEvent::Modifiers,
                       TimeTicks platform_time_stamp,
                       InputDeviceCapabilities* source_capabilities = nullptr);
   UIEventWithKeyState(const AtomicString& type,
-                      const EventModifierInit& initializer);
+                      const EventModifierInit& initializer,
+                      TimeTicks platform_time_stamp);
+  UIEventWithKeyState(const AtomicString& type,
+                      const EventModifierInit& initializer)
+      : UIEventWithKeyState(type, initializer, TimeTicks::Now()) {}
   void InitModifiers(bool ctrl_key,
                      bool alt_key,
                      bool shift_key,
                      bool meta_key);
 
   unsigned modifiers_;
 
  private:
   static bool new_tab_modifier_set_from_isolated_world_;
 };
 
 UIEventWithKeyState* FindEventWithKeyState(Event*);
 
 }  // namespace blink
 
 #endif  // UIEventWithKeyState_h