Move CSS animations use counters to UseCounter

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 113 matching lines @@
     for (size_t j = 1; j < offsets.size(); ++j) {
       keyframes.push_back(
           toStringKeyframe(keyframe->cloneWithOffset(offsets[j]).get()));
     }
   }
 
   DEFINE_STATIC_LOCAL(SparseHistogram, propertyHistogram,
                       ("WebCore.Animation.CSSProperties"));
   for (CSSPropertyID property : specifiedPropertiesForUseCounter) {
     DCHECK(isValidCSSPropertyID(property));
+    UseCounter::countAnimatedCSS(elementForScoping->document(), property);
+
+    // TODO(crbug.com/458925): Remove legacy histogram and counts
     propertyHistogram.sample(
         UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(property));
   }
 
   // Merge duplicate keyframes.
   std::stable_sort(keyframes.begin(), keyframes.end(),
                    Keyframe::compareOffsets);
   size_t targetIndex = 0;
   for (size_t i = 1; i < keyframes.size(); i++) {
     if (keyframes[i]->offset() == keyframes[targetIndex]->offset()) {
@@ skipping 440 matching lines @@
         KeyframeEffectReadOnly::TransitionPriority, eventDelegate);
     Animation* animation = element->document().timeline().play(transition);
     animation->setId(getPropertyName(newTransition.id));
     // Set the current time as the start time for retargeted transitions
     if (retargetedCompositorTransitions.contains(id))
       animation->setStartTime(element->document().timeline().currentTime());
     animation->update(TimingUpdateOnDemand);
     runningTransition.animation = animation;
     m_transitions.set(id, runningTransition);
     DCHECK(isValidCSSPropertyID(id));
+    UseCounter::countAnimatedCSS(element->document(), id);
 
+    // TODO(crbug.com/458925): Remove legacy histogram and counts
     DEFINE_STATIC_LOCAL(SparseHistogram, propertyHistogram,
                         ("WebCore.Animation.CSSProperties"));
     propertyHistogram.sample(
         UseCounter::mapCSSPropertyIdToCSSSampleIdForHistogram(id));
   }
   clearPendingUpdate();
 }
 
 void CSSAnimations::calculateTransitionUpdateForProperty(
     CSSPropertyID id,
@@ skipping 463 matching lines @@
              isCustomPropertyHandle);
 }
 
 DEFINE_TRACE(CSSAnimations) {
   visitor->trace(m_transitions);
   visitor->trace(m_pendingUpdate);
   visitor->trace(m_runningAnimations);
 }
 
 }  // namespace blink