Revert "Lazily constructed bespoke cancellable timer task. This is"

Source/platform/Timer.h

 /*
  * Copyright (C) 2006 Apple Computer, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef Timer_h
 #define Timer_h
 
 #include "platform/PlatformExport.h"
 #include "platform/heap/Handle.h"
+#include "platform/scheduler/CancellableTaskFactory.h"
 #include "public/platform/WebTraceLocation.h"
 #include "wtf/AddressSanitizer.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Threading.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 // Time intervals are all in seconds.
 
@@ skipping 38 matching lines @@
 private:
     virtual void fired() = 0;
 
     NO_LAZY_SWEEP_SANITIZE_ADDRESS
     virtual bool canFire() const { return true; }
 
     virtual double alignedFireTime(double fireTime) const { return fireTime; }
 
     void setNextFireTime(double now, double delay);
 
-    void runInternal();
-
-    class CancellableTimerTask final : public WebThread::Task {
-        WTF_MAKE_NONCOPYABLE(CancellableTimerTask);
-    public:
-        explicit CancellableTimerTask(TimerBase* timer) : m_timer(timer) { }
-
-        ~CancellableTimerTask() override { }
-
-        void run() override
-        {
-            if (m_timer) {
-                m_timer->m_cancellableTimerTask = nullptr;
-                m_timer->runInternal();
-            }
-        }
-
-        void cancel()
-        {
-            m_timer = nullptr;
-        }
-
-    private:
-        TimerBase* m_timer; // NOT OWNED
-    };
+    void run();
 
     double m_nextFireTime; // 0 if inactive
     double m_unalignedNextFireTime; // m_nextFireTime not considering alignment interval
     double m_repeatInterval; // 0 if not repeating
     WebTraceLocation m_location;
-    CancellableTimerTask* m_cancellableTimerTask; // NOT OWNED
+    CancellableTaskFactory m_cancellableTaskFactory;
     WebScheduler* m_webScheduler; // Not owned.
 
 #if ENABLE(ASSERT)
     ThreadIdentifier m_thread;
 #endif
 
     friend class ThreadTimers;
     friend class TimerHeapLessThanFunction;
     friend class TimerHeapReference;
 };
@@ skipping 48 matching lines @@
     // in the current code base).
     GC_PLUGIN_IGNORE("363031")
     TimerFiredClass* m_object;
     TimerFiredFunction m_function;
 };
 
 NO_LAZY_SWEEP_SANITIZE_ADDRESS
 inline bool TimerBase::isActive() const
 {
     ASSERT(m_thread == currentThread());
-    return m_cancellableTimerTask;
+    return m_cancellableTaskFactory.isPending();
 }
 
 } // namespace blink
 
 #endif // Timer_h