Don't schedule a wake-up if the timeline hasn't started

third_party/WebKit/Source/core/svg/animation/SMILTimeContainer.cpp

 /*
  * Copyright (C) 2008 Apple 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 209 matching lines @@
 }
 
 void SMILTimeContainer::resume()
 {
     if (!handleAnimationPolicy(RestartOnceTimer))
         return;
     DCHECK(isPaused());
 
     m_paused = false;
 
-    if (isStarted())
-        synchronizeToDocumentTimeline();
+    if (!isStarted())
+        return;
 
+    synchronizeToDocumentTimeline();
     scheduleWakeUp(0, SynchronizeAnimations);
 }
 
 void SMILTimeContainer::setElapsed(SMILTime time)
 {
     m_presentationTime = time.value();
 
     // If the document hasn't finished loading, |m_presentationTime| will be
     // used as the start time to seek to once it's possible.
     if (!isStarted())
@@ skipping 302 matching lines @@
     setElapsed(elapsed().value() + initialFrameDelay);
 }
 
 DEFINE_TRACE(SMILTimeContainer)
 {
     visitor->trace(m_scheduledAnimations);
     visitor->trace(m_ownerSVGElement);
 }
 
 } // namespace blink