Web Animations CSS: Unfreeze AnimationClock if sampling timelines does not trigger style recalc

Source/core/animation/Player.h

Index: Source/core/animation/Player.h
diff --git a/Source/core/animation/Player.h b/Source/core/animation/Player.h
index 0efa5e50ffd038374524d0ccf4eb0c1116e34354..59d478709bcc396209794099fd01a7294a139688 100644
--- a/Source/core/animation/Player.h
+++ b/Source/core/animation/Player.h
@@ -49,7 +49,7 @@ public:
     //  infinity  - if this player is no longer in effect
     //  0         - if this player requires an update on the next frame
     //  n         - if this player requires an update after 'n' units of time
-    bool update(double* timeToEffectChange = 0);
+    bool update(double* timeToEffectChange = 0, bool* didTriggerStyleRecalc = 0);
 
     void cancel();
     double currentTime() const;