Chrome currently doesn't ignore transitions when using "@media print"

third_party/WebKit/Source/core/animation/css/CSSAnimations.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 525 matching lines @@
     AnimatableValueKeyframeEffectModel* model = AnimatableValueKeyframeEffectModel::create(keyframes);
     update.startTransition(id, from.get(), to.get(), InertEffect::create(model, timing, false, 0));
     ASSERT(!element->elementAnimations() || !element->elementAnimations()->isAnimationStyleChange());
 }
 
 void CSSAnimations::calculateTransitionUpdate(CSSAnimationUpdate& update, const Element* animatingElement, const ComputedStyle& style)
 {
     if (!animatingElement)
         return;
 
+    if (animatingElement->document().printing() || animatingElement->document().wasPrinting())
+        return;
+
     ElementAnimations* elementAnimations = animatingElement->elementAnimations();
     const TransitionMap* activeTransitions = elementAnimations ? &elementAnimations->cssAnimations().m_transitions : nullptr;
     const CSSTransitionData* transitionData = style.transitions();
 
 #if ENABLE(ASSERT)
     // In debug builds we verify that it would have been safe to avoid populating and testing listedProperties if the style recalc is due to animation.
     const bool animationStyleRecalc = false;
 #else
     // In release builds we avoid the cost of checking for new and interrupted transitions if the style recalc is due to animation.
     const bool animationStyleRecalc = elementAnimations && elementAnimations->isAnimationStyleChange();
@@ skipping 256 matching lines @@
 }
 
 DEFINE_TRACE(CSSAnimations)
 {
     visitor->trace(m_transitions);
     visitor->trace(m_pendingUpdate);
     visitor->trace(m_animations);
 }
 
 } // namespace blink