Make WebTaskRunner ThreadSafeRefCounted

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 469 matching lines @@
           TaskRunnerHelper::get(TaskType::UnspecedTimer, this),
           this,
           &Document::elementDataCacheClearTimerFired),
       m_timeline(DocumentTimeline::create(this)),
       m_compositorPendingAnimations(new CompositorPendingAnimations(*this)),
       m_templateDocumentHost(nullptr),
       m_didAssociateFormControlsTimer(
           TaskRunnerHelper::get(TaskType::UnspecedLoading, this),
           this,
           &Document::didAssociateFormControlsTimerFired),
-      m_timers(TaskRunnerHelper::get(TaskType::Timer, this)->clone()),
+      m_timers(TaskRunnerHelper::get(TaskType::Timer, this)),
       m_hasViewportUnits(false),
       m_parserSyncPolicy(AllowAsynchronousParsing),
       m_nodeCount(0),
       m_wouldLoadReason(Created),
       m_passwordCount(0),
       m_engagementLevel(mojom::blink::EngagementLevel::NONE) {
   if (m_frame) {
     DCHECK(m_frame->page());
     provideContextFeaturesToDocumentFrom(*this, *m_frame->page());
 
@@ skipping 1993 matching lines @@
   if (!loader())
     m_fetcher->clearContext();
   // If this document is the master for an HTMLImportsController, sever that
   // relationship. This ensures that we don't leave import loads in flight,
   // thinking they should have access to a valid frame when they don't.
   if (m_importsController) {
     m_importsController->dispose();
     clearImportsController();
   }
 
-  m_timers.setTimerTaskRunner(Platform::current()
-                                  ->currentThread()
-                                  ->scheduler()
-                                  ->timerTaskRunner()
-                                  ->clone());
+  m_timers.setTimerTaskRunner(
+      Platform::current()->currentThread()->scheduler()->timerTaskRunner());
 
   if (m_mediaQueryMatcher)
     m_mediaQueryMatcher->documentDetached();
 
   m_lifecycle.advanceTo(DocumentLifecycle::Stopped);
 
   // TODO(haraken): Call contextDestroyed() before we start any disruptive
   // operations.
   // TODO(haraken): Currently we call notifyContextDestroyed() only in
   // Document::detachLayoutTree(), which means that we don't call
@@ skipping 4064 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif