Web Animations: Don't mark players as outdated upon currentTime access

Source/core/animation/DocumentTimeline.cpp

Index: Source/core/animation/DocumentTimeline.cpp
diff --git a/Source/core/animation/DocumentTimeline.cpp b/Source/core/animation/DocumentTimeline.cpp
index 681d9ff382aa2d6f257a5958c0294b4e5f8780cf..af825b414bac515c369d2f85056973031ea0d6c6 100644
--- a/Source/core/animation/DocumentTimeline.cpp
+++ b/Source/core/animation/DocumentTimeline.cpp
@@ -93,6 +93,7 @@ void DocumentTimeline::serviceAnimations()
     TRACE_EVENT0("webkit", "DocumentTimeline::serviceAnimations");
 
     m_timing->cancelWake();
+    m_hasOutdatedPlayer = false;
 
     double timeToNextEffect = std::numeric_limits<double>::infinity();
     Vector<Player*> playersToRemove;
@@ -111,7 +112,7 @@ void DocumentTimeline::serviceAnimations()
     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)