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

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

 /*
  * 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, 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 12 matching lines @@
 #include "core/events/Event.h"
 
 #include "core/dom/StaticNodeList.h"
 #include "core/events/EventDispatchMediator.h"
 #include "core/events/EventTarget.h"
 #include "core/frame/HostsUsingFeatures.h"
 #include "core/frame/UseCounter.h"
 #include "core/svg/SVGElement.h"
 #include "core/timing/DOMWindowPerformance.h"
 #include "core/timing/Performance.h"
-#include "wtf/CurrentTime.h"
 
 namespace blink {
 
 static bool isEventTypeScopedInV0(const AtomicString& eventType) {
   // WebKit never allowed selectstart event to cross the the shadow DOM
   // boundary.  Changing this breaks existing sites.
   // See https://bugs.webkit.org/show_bug.cgi?id=52195 for details.
   return eventType == EventTypeNames::abort ||
          eventType == EventTypeNames::change ||
          eventType == EventTypeNames::error ||
          eventType == EventTypeNames::load ||
          eventType == EventTypeNames::reset ||
          eventType == EventTypeNames::resize ||
          eventType == EventTypeNames::scroll ||
          eventType == EventTypeNames::select ||
          eventType == EventTypeNames::selectstart ||
          eventType == EventTypeNames::slotchange;
 }
 
 Event::Event() : Event("", false, false) {
   m_wasInitialized = false;
 }
 
 Event::Event(const AtomicString& eventType,
              bool canBubbleArg,
              bool cancelableArg,
-             double platformTimeStamp)
+             TimeTicks platformTimeStamp)
     : Event(eventType,
             canBubbleArg,
             cancelableArg,
             ComposedMode::Scoped,
             platformTimeStamp) {}
 
 Event::Event(const AtomicString& eventType,
              bool canBubbleArg,
              bool cancelableArg,
              ComposedMode composedMode)
     : Event(eventType,
             canBubbleArg,
             cancelableArg,
             composedMode,
-            monotonicallyIncreasingTime()) {}
+            TimeTicks::Now()) {}
 
 Event::Event(const AtomicString& eventType,
              bool canBubbleArg,
              bool cancelableArg,
              ComposedMode composedMode,
-             double platformTimeStamp)
+             TimeTicks platformTimeStamp)
     : m_type(eventType),
       m_canBubble(canBubbleArg),
       m_cancelable(cancelableArg),
       m_composed(composedMode == ComposedMode::Composed),
       m_isEventTypeScopedInV0(isEventTypeScopedInV0(eventType)),
       m_propagationStopped(false),
       m_immediatePropagationStopped(false),
       m_defaultPrevented(false),
       m_defaultHandled(false),
       m_cancelBubble(false),
       m_wasInitialized(true),
       m_isTrusted(false),
       m_preventDefaultCalledOnUncancelableEvent(false),
       m_handlingPassive(PassiveMode::NotPassiveDefault),
       m_eventPhase(0),
       m_currentTarget(nullptr),
       m_platformTimeStamp(platformTimeStamp) {}
 
 Event::Event(const AtomicString& eventType, const EventInit& initializer)
     : Event(eventType,
             initializer.bubbles(),
             initializer.cancelable(),
             initializer.composed() ? ComposedMode::Composed
                                    : ComposedMode::Scoped,
-            monotonicallyIncreasingTime()) {}
+            TimeTicks::Now()) {}
 
 Event::~Event() {}
 
 bool Event::isScopedInV0() const {
   return isTrusted() && m_isEventTypeScopedInV0;
 }
 
 void Event::initEvent(const AtomicString& eventTypeArg,
                       bool canBubbleArg,
                       bool cancelableArg) {
@@ skipping 208 matching lines @@
 
 EventDispatchMediator* Event::createMediator() {
   return EventDispatchMediator::create(this);
 }
 
 double Event::timeStamp(ScriptState* scriptState) const {
   double timeStamp = 0;
   if (scriptState && scriptState->domWindow()) {
     Performance* performance =
         DOMWindowPerformance::performance(*scriptState->domWindow());
+    double timestampSeconds = (m_platformTimeStamp - TimeTicks()).InSecondsF();
     timeStamp =
-        performance->monotonicTimeToDOMHighResTimeStamp(m_platformTimeStamp);
+        performance->monotonicTimeToDOMHighResTimeStamp(timestampSeconds);
   }
 
   return timeStamp;
 }
 
 void Event::setCancelBubble(ExecutionContext* context, bool cancel) {
   if (!m_cancelBubble && cancel)
     UseCounter::count(context, UseCounter::EventCancelBubbleWasChangedToTrue);
   else if (m_cancelBubble && !cancel)
     UseCounter::count(context, UseCounter::EventCancelBubbleWasChangedToFalse);
   m_cancelBubble = cancel;
 }
 
 DEFINE_TRACE(Event) {
   visitor->trace(m_currentTarget);
   visitor->trace(m_target);
   visitor->trace(m_underlyingEvent);
   visitor->trace(m_eventPath);
 }
 
 }  // namespace blink