bindings: Pass is_null flag to attribute setters when they are nullable

third_party/WebKit/Source/core/animation/Animation.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 73 matching lines @@
   // timeToEffectChange returns:
   //  infinity  - if this animation is no longer in effect
   //  0         - if this animation requires an update on the next frame
   //  n         - if this animation requires an update after 'n' units of time
   double TimeToEffectChange();
 
   void cancel();
 
   double currentTime(bool& is_null);
   double currentTime();
-  void setCurrentTime(double new_current_time);
+  void setCurrentTime(double new_current_time, bool is_null);
 
   double CurrentTimeInternal() const;
   double UnlimitedCurrentTimeInternal() const;
 
   void SetCurrentTimeInternal(double new_current_time,
                               TimingUpdateReason = kTimingUpdateOnDemand);
   bool Paused() const { return paused_ && !is_paused_for_testing_; }
   static const char* PlayStateString(AnimationPlayState);
   String playState() const { return PlayStateString(PlayStateInternal()); }
   AnimationPlayState PlayStateInternal() const;
@@ skipping 24 matching lines @@
   double playbackRate() const;
   void setPlaybackRate(double);
   const AnimationTimeline* timeline() const { return timeline_; }
   AnimationTimeline* timeline() { return timeline_; }
 
   double CalculateStartTime(double current_time) const;
   bool HasStartTime() const { return !IsNull(start_time_); }
   double startTime(bool& is_null) const;
   double startTime() const;
   double StartTimeInternal() const { return start_time_; }
-  void setStartTime(double);
+  void setStartTime(double, bool is_null);
   void SetStartTimeInternal(double);
 
   const AnimationEffectReadOnly* effect() const { return content_.Get(); }
   AnimationEffectReadOnly* effect() { return content_.Get(); }
   void setEffect(AnimationEffectReadOnly*);
 
   void setId(const String& id) { id_ = id; }
   const String& id() const { return id_; }
 
   // Pausing via this method is not reflected in the value returned by
@@ skipping 201 matching lines @@
 
   bool current_time_pending_;
   bool state_is_being_updated_;
 
   bool effect_suppressed_;
 };
 
 }  // namespace blink
 
 #endif  // Animation_h