Web Animations: Remove timeLag from Player API and model

Source/core/animation/AnimationPlayer.h

Index: Source/core/animation/AnimationPlayer.h
diff --git a/Source/core/animation/AnimationPlayer.h b/Source/core/animation/AnimationPlayer.h
index 6efd5c7cb33aadb7445c4fc4ffd98a44bd127d8a..397e857b7b2c113e036152acc2d24c7a206ad19b 100644
--- a/Source/core/animation/AnimationPlayer.h
+++ b/Source/core/animation/AnimationPlayer.h
@@ -65,6 +65,7 @@ public:
     double currentTime();
     void setCurrentTime(double newCurrentTime);
 
+    double calculateCurrentTime() const;
     double currentTimeInternal();
     void setCurrentTimeInternal(double newCurrentTime);
 
@@ -105,9 +106,6 @@ public:
     AnimationNode* source() { return m_content.get(); }
     void setSource(AnimationNode*);
 
-    double timeLag() { return timeLagInternal() * 1000; }
-    double timeLagInternal() { return currentTimeWithoutLag() - currentTimeInternal(); }
-
     // Pausing via this method is not reflected in the value returned by
     // paused() and must never overlap with pausing via pause().
     void pauseForTesting(double pauseTime);
@@ -159,15 +157,11 @@ private:
     AnimationPlayer(ExecutionContext*, AnimationTimeline&, AnimationNode*);
     double sourceEnd() const;
     bool limited(double currentTime) const;
-    double currentTimeWithoutLag() const;
-    double currentTimeWithLag() const;
-    void updateTimingState(double newCurrentTime);
     void updateCurrentTimingState();
 
     double m_playbackRate;
     double m_startTime;
     double m_holdTime;
-    double m_storedTimeLag;
 
     SortInfo m_sortInfo;
 
@@ -178,8 +172,8 @@ private:
     bool m_held;
     bool m_isPausedForTesting;
 
-    // This indicates timing information relevant to the player has changed by
-    // means other than the ordinary progression of time
+    // This indicates timing information relevant to the player's effect
+    // has changed by means other than the ordinary progression of time
     bool m_outdated;
 
     bool m_finished;