Refactor how UseCounter::SyntheticKeyframesInCompositedCSSAnimation is counted

third_party/WebKit/Source/core/animation/KeyframeEffectModel.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 18 matching lines @@
  */
 
 #include "core/animation/KeyframeEffectModel.h"
 
 #include "core/animation/AnimationEffectReadOnly.h"
 #include "core/animation/CompositorAnimations.h"
 #include "core/animation/css/CSSAnimatableValueFactory.h"
 #include "core/css/CSSPropertyEquality.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/Document.h"
+#include "core/frame/UseCounter.h"
 #include "platform/animation/AnimationUtilities.h"
 #include "platform/geometry/FloatBox.h"
 #include "platform/transforms/TransformationMatrix.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
 
 PropertyHandleSet KeyframeEffectModelBase::properties() const {
   PropertyHandleSet result;
@@ skipping 54 matching lines @@
   }
   return updated;
 }
 
 bool KeyframeEffectModelBase::snapshotAllCompositorKeyframes(
     Element& element,
     const ComputedStyle& baseStyle,
     const ComputedStyle* parentStyle) const {
   m_needsCompositorKeyframesSnapshot = false;
   bool updated = false;
+  bool hasNeutralCompositableKeyframe = false;
   ensureKeyframeGroups();
   for (CSSPropertyID property : CompositorAnimations::compositableProperties) {
     PropertySpecificKeyframeGroup* keyframeGroup =
         m_keyframeGroups->get(PropertyHandle(property));
     if (!keyframeGroup)
       continue;
-    for (auto& keyframe : keyframeGroup->m_keyframes)
+    for (auto& keyframe : keyframeGroup->m_keyframes) {
       updated |= keyframe->populateAnimatableValue(property, element, baseStyle,
                                                    parentStyle);
+      hasNeutralCompositableKeyframe |= keyframe->isNeutral();
+    }
+  }
+  if (updated && hasNeutralCompositableKeyframe) {
+    UseCounter::count(element.document(),
+                      UseCounter::SyntheticKeyframesInCompositedCSSAnimation);
   }
   return updated;
 }
 
 KeyframeEffectModelBase::KeyframeVector
 KeyframeEffectModelBase::normalizedKeyframes(const KeyframeVector& keyframes) {
   double lastOffset = 0;
   KeyframeVector result;
   result.reserveCapacity(keyframes.size());
 
@@ skipping 177 matching lines @@
   }
   if (m_keyframes.back()->offset() != 1.0) {
     appendKeyframe(m_keyframes.back()->neutralKeyframe(1, nullptr));
     addedSyntheticKeyframe = true;
   }
 
   return addedSyntheticKeyframe;
 }
 
 }  // namespace blink