Web Animations: Remove timeLag from Player API and model

Source/core/animation/AnimationPlayer.h

 /*
  * 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 47 matching lines @@
     //  infinity  - if this player is no longer in effect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
     double timeToEffectChange();
 
     void cancel();
 
     double currentTime();
     void setCurrentTime(double newCurrentTime);
 
+    double calculateCurrentTime() const;
     double currentTimeInternal();
     void setCurrentTimeInternal(double newCurrentTime);
 
     bool paused() const { return m_paused && !m_isPausedForTesting; }
     void pause();
     void play();
     void reverse();
     void finish(ExceptionState&);
     bool finished() { return limited(currentTimeInternal()); }
     // FIXME: Resolve whether finished() should just return the flag, and
@@ skipping 20 matching lines @@
     bool hasStartTime() const { return !isNull(m_startTime); }
     double startTime() const { return m_startTime * 1000; }
     double startTimeInternal() const { return m_startTime; }
     void setStartTime(double startTime) { setStartTimeInternal(startTime / 1000); }
     void setStartTimeInternal(double, bool isUpdateFromCompositor = false);
 
     const AnimationNode* source() const { return m_content.get(); }
     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);
     // This should only be used for CSS
     void unpause();
 
     void setOutdated();
     bool outdated() { return m_outdated; }
 
     bool canStartAnimationOnCompositor();
@@ skipping 31 matching lines @@
 #endif
 
     virtual bool addEventListener(const AtomicString& eventType, PassRefPtr<EventListener>, bool useCapture = false) OVERRIDE;
 
     virtual void trace(Visitor*) OVERRIDE;
 
 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;
 
     RefPtrWillBeMember<AnimationNode> m_content;
     RawPtrWillBeMember<AnimationTimeline> m_timeline;
     // Reflects all pausing, including via pauseForTesting().
     bool m_paused;
     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;
     // Holds a 'finished' event queued for asynchronous dispatch via the
     // ScriptedAnimationController. This object remains active until the
     // event is actually dispatched.
     RefPtrWillBeMember<Event> m_pendingFinishedEvent;
 };
 
 } // namespace
 
 #endif