Web Animations: Don't mark players as outdated upon currentTime access

Source/core/animation/DocumentTimeline.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 75 matching lines @@
 void DocumentTimeline::wake()
 {
     m_timing->serviceOnNextFrame();
 }
 
 void DocumentTimeline::serviceAnimations()
 {
     TRACE_EVENT0("webkit", "DocumentTimeline::serviceAnimations");
 
     m_timing->cancelWake();
+    m_hasOutdatedPlayer = false;
 
     double timeToNextEffect = std::numeric_limits<double>::infinity();
     Vector<Player*> playersToRemove;
     for (HashSet<RefPtr<Player> >::iterator it = m_playersNeedingUpdate.begin(); it != m_playersNeedingUpdate.end(); ++it) {
         Player* player = it->get();
         if (!player->update())
             playersToRemove.append(player);
         timeToNextEffect = std::min(timeToNextEffect, player->timeToEffectChange());
     }
     for (size_t i = 0; i < playersToRemove.size(); ++i)
         m_playersNeedingUpdate.remove(playersToRemove[i]);
 
     ASSERT(!m_playersNeedingUpdate.isEmpty() || timeToNextEffect == std::numeric_limits<double>::infinity());
     if (timeToNextEffect < s_minimumDelay)
         m_timing->serviceOnNextFrame();
     else if (timeToNextEffect != std::numeric_limits<double>::infinity())
         m_timing->wakeAfter(timeToNextEffect - s_minimumDelay);
 
-    m_hasOutdatedPlayer = false;
+    ASSERT(!m_hasOutdatedPlayer);
 }
 
 void DocumentTimeline::setZeroTime(double zeroTime)
 {
     ASSERT(isNull(m_zeroTime));
     m_zeroTime = zeroTime;
     ASSERT(!isNull(m_zeroTime));
     serviceAnimations();
 }
 
@@ skipping 50 matching lines @@
             count += (timedItem && (timedItem->isCurrent() || timedItem->isInEffect()));
     }
     return count;
 }
 
 void DocumentTimeline::detachFromDocument() {
     m_document = 0;
 }
 
 } // namespace