Worker: Fix broken GC logic on Dedicated Worker while DOMTimer is set

third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/DOMTimerCoordinator.h"
 
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/DOMTimer.h"
 #include <algorithm>
 #include <memory>
@@ skipping 26 matching lines @@
     if (timeoutID <= 0)
         return nullptr;
 
     DOMTimer* removedTimer = m_timers.take(timeoutID);
     if (removedTimer)
         removedTimer->disposeTimer();
 
     return removedTimer;
 }
 
+bool DOMTimerCoordinator::hasInstalledTimeout() const
+{
+    return !m_timers.isEmpty();
+}
+
 DEFINE_TRACE(DOMTimerCoordinator)
 {
     visitor->trace(m_timers);
 }
 
 int DOMTimerCoordinator::nextID()
 {
     while (true) {
         ++m_circularSequentialID;
 
         if (m_circularSequentialID <= 0)
             m_circularSequentialID = 1;
 
         if (!m_timers.contains(m_circularSequentialID))
             return m_circularSequentialID;
     }
 }
 
 void DOMTimerCoordinator::setTimerTaskRunner(std::unique_ptr<WebTaskRunner> timerTaskRunner)
 {
     m_timerTaskRunner = std::move(timerTaskRunner);
 }
 
 } // namespace blink