[Reland] Per WebViewScheduler virtual time

third_party/WebKit/Source/platform/Timer.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 22 matching lines @@
 #include "wtf/Atomics.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/HashSet.h"
 #include <algorithm>
 #include <limits.h>
 #include <limits>
 #include <math.h>
 
 namespace blink {
 
-TimerBase::TimerBase() : TimerBase(Platform::current()->currentThread()->scheduler()->timerTaskRunner()) { }
+TimerBase::TimerBase()
+    : m_nextFireTime(0)
+    , m_repeatInterval(0)
+    , m_cancellableTimerTask(nullptr)
+    , m_thread(Platform::current()->currentThread())
+    , m_webTaskRunner(m_thread->scheduler()->timerTaskRunner())
+{
+}
 
 TimerBase::TimerBase(WebTaskRunner* webTaskRunner)
     : m_nextFireTime(0)
     , m_repeatInterval(0)
     , m_cancellableTimerTask(nullptr)
+    , m_thread(Platform::current()->currentThread())
     , m_webTaskRunner(webTaskRunner)
-#if ENABLE(ASSERT)
-    , m_thread(currentThread())
-#endif
 {
     ASSERT(m_webTaskRunner);
 }
 
 TimerBase::~TimerBase()
 {
     stop();
 }
 
 void TimerBase::start(double nextFireInterval, double repeatInterval, const WebTraceLocation& caller)
 {
-    ASSERT(m_thread == currentThread());
+    ASSERT(m_thread->isCurrentThread());
 
     m_location = caller;
     m_repeatInterval = repeatInterval;
-    setNextFireTime(monotonicallyIncreasingTime(), nextFireInterval);
+    setNextFireTime(timerMonotonicallyIncreasingTime(), nextFireInterval);
 }
 
 void TimerBase::stop()
 {
-    ASSERT(m_thread == currentThread());
+    ASSERT(m_thread->isCurrentThread());
 
     m_repeatInterval = 0;
     m_nextFireTime = 0;
     if (m_cancellableTimerTask)
         m_cancellableTimerTask->cancel();
     m_cancellableTimerTask = nullptr;
 }
 
 double TimerBase::nextFireInterval() const
 {
     ASSERT(isActive());
-    double current = monotonicallyIncreasingTime();
+    double current = timerMonotonicallyIncreasingTime();
     if (m_nextFireTime < current)
         return 0;
     return m_nextFireTime - current;
 }
 
 WebTaskRunner* TimerBase::timerTaskRunner()
 {
     return m_webTaskRunner;
 }
 
 void TimerBase::setNextFireTime(double now, double delay)
 {
-    ASSERT(m_thread == currentThread());
+    ASSERT(m_thread->isCurrentThread());
 
     double newTime = now + delay;
 
     if (m_nextFireTime != newTime) {
         m_nextFireTime = newTime;
         if (m_cancellableTimerTask)
             m_cancellableTimerTask->cancel();
         m_cancellableTimerTask = new CancellableTimerTask(this);
 
         double delayMs = 1000.0 * (newTime - now);
         timerTaskRunner()->postDelayedTask(m_location, m_cancellableTimerTask, delayMs);
     }
 }
 
 NO_LAZY_SWEEP_SANITIZE_ADDRESS
 void TimerBase::runInternal()
 {
     if (!canFire())
         return;
 
     TRACE_EVENT0("blink", "TimerBase::run");
-    ASSERT_WITH_MESSAGE(m_thread == currentThread(), "Timer posted by %s %s was run on a different thread", m_location.functionName(), m_location.fileName());
+    ASSERT_WITH_MESSAGE(m_thread->isCurrentThread(), "Timer posted by %s %s was run on a different thread", m_location.functionName(), m_location.fileName());
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "BlinkInternal");
 
     if (m_repeatInterval) {
-        double now = monotonicallyIncreasingTime();
+        double now = timerMonotonicallyIncreasingTime();
         // This computation should be drift free, and it will cope if we miss a beat,
         // which can easily happen if the thread is busy.  It will also cope if we get
         // called slightly before m_unalignedNextFireTime, which can happen due to lack
         // of timer precision.
         double intervalToNextFireTime = m_repeatInterval - fmod(now - m_nextFireTime, m_repeatInterval);
-        setNextFireTime(monotonicallyIncreasingTime(), intervalToNextFireTime);
+        setNextFireTime(timerMonotonicallyIncreasingTime(), intervalToNextFireTime);
     } else {
         m_nextFireTime = 0;
     }
     fired();
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "Sleeping");
 }
 
 bool TimerBase::Comparator::operator()(const TimerBase* a, const TimerBase* b) const
 {
     return a->m_nextFireTime < b->m_nextFireTime;
 }
 
 // static
 WebTaskRunner* TimerBase::UnthrottledWebTaskRunner()
 {
     return Platform::current()->currentThread()->taskRunner();
 }
 
 } // namespace blink