Make Timer and CancellableTaskFactory embeddeable in lazily swept objects.

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 66 matching lines @@
 
 double TimerBase::nextFireInterval() const
 {
     ASSERT(isActive());
     double current = monotonicallyIncreasingTime();
     if (m_nextFireTime < current)
         return 0;
     return m_nextFireTime - current;
 }
 
-NO_LAZY_SWEEP_SANITIZE_ADDRESS
 void TimerBase::setNextFireTime(double now, double delay)
 {
     ASSERT(m_thread == currentThread());
 
     m_unalignedNextFireTime = now + delay;
 
     double newTime = alignedFireTime(m_unalignedNextFireTime);
     if (m_nextFireTime != newTime) {
         m_nextFireTime = newTime;
         // Round the delay up to the nearest millisecond to be consistant with the
         // previous behavior of BlinkPlatformImpl::setSharedTimerFireInterval.
         long long delayMs = static_cast<long long>(ceil((newTime - now) * 1000.0));
         if (delayMs < 0)
             delayMs = 0;
         m_webScheduler->postTimerTask(m_location, m_cancellableTaskFactory.cancelAndCreate(), delayMs);
     }
 }
 
+NO_LAZY_SWEEP_SANITIZE_ADDRESS
 void TimerBase::run()
 {
+    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());
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "BlinkInternal");
 
     m_nextFireTime = 0;
     // Note: repeating timers drift, but this is preserving the functionality of the old timer heap.
     // See crbug.com/328700.
     if (m_repeatInterval)
         setNextFireTime(monotonicallyIncreasingTime(), m_repeatInterval);
     fired();
     TRACE_EVENT_SET_SAMPLING_STATE("blink", "Sleeping");
 }
 
 void TimerBase::didChangeAlignmentInterval(double now)
 {
     setNextFireTime(now, m_unalignedNextFireTime - now);
 }
 
 double TimerBase::nextUnalignedFireInterval() const
 {
     ASSERT(isActive());
     return std::max(m_unalignedNextFireTime - monotonicallyIncreasingTime(), 0.0);
 }
 
 } // namespace blink