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

third_party/WebKit/Source/core/animation/Animation.cpp

 /*
  * 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 118 matching lines @@
 
 double Animation::EffectEnd() const {
   return content_ ? content_->EndTimeInternal() : 0;
 }
 
 bool Animation::Limited(double current_time) const {
   return (playback_rate_ < 0 && current_time <= 0) ||
          (playback_rate_ > 0 && current_time >= EffectEnd());
 }
 
-void Animation::setCurrentTime(double new_current_time) {
+void Animation::setCurrentTime(double new_current_time, bool is_null) {
   PlayStateUpdateScope update_scope(*this, kTimingUpdateOnDemand);
 
   if (PlayStateInternal() == kIdle)
     paused_ = true;
 
   current_time_pending_ = false;
   play_state_ = kUnset;
   SetCurrentTimeInternal(new_current_time / 1000, kTimingUpdateOnDemand);
 
   if (CalculatePlayState() == kFinished)
@@ skipping 254 matching lines @@
 double Animation::CalculateStartTime(double current_time) const {
   return timeline_->EffectiveTime() - current_time / playback_rate_;
 }
 
 double Animation::CalculateCurrentTime() const {
   if (IsNull(start_time_) || !timeline_)
     return 0;
   return (timeline_->EffectiveTime() - start_time_) * playback_rate_;
 }
 
-void Animation::setStartTime(double start_time) {
+void Animation::setStartTime(double start_time, bool is_null) {
   PlayStateUpdateScope update_scope(*this, kTimingUpdateOnDemand);
 
   if (start_time == start_time_)
     return;
 
   current_time_pending_ = false;
   play_state_ = kUnset;
   paused_ = false;
   SetStartTimeInternal(start_time / 1000);
 }
@@ skipping 750 matching lines @@
   DCHECK(!compositor_player_);
 }
 
 void Animation::CompositorAnimationPlayerHolder::Detach() {
   DCHECK(compositor_player_);
   compositor_player_->SetAnimationDelegate(nullptr);
   animation_ = nullptr;
   compositor_player_.reset();
 }
 }  // namespace blink