Use WTF::TimeTicks to represent timestamp in Platform/Core event types

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

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 11 matching lines @@
 
 namespace blink {
 
 UIEventWithKeyState::UIEventWithKeyState(
     const AtomicString& type,
     bool canBubble,
     bool cancelable,
     AbstractView* view,
     int detail,
     PlatformEvent::Modifiers modifiers,
-    double platformTimeStamp,
+    TimeTicks platformTimeStamp,
     InputDeviceCapabilities* sourceCapabilities)
     : UIEvent(type,
               canBubble,
               cancelable,
               ComposedMode::Composed,
               platformTimeStamp,
               view,
               detail,
               sourceCapabilities),
       m_modifiers(modifiers) {}
@@ skipping 109 matching lines @@
 }
 
 UIEventWithKeyState* findEventWithKeyState(Event* event) {
   for (Event* e = event; e; e = e->underlyingEvent())
     if (e->isKeyboardEvent() || e->isMouseEvent())
       return static_cast<UIEventWithKeyState*>(e);
   return nullptr;
 }
 
 }  // namespace blink