Web Animation API: Add use counter for Animation constructors

Source/core/animation/Animation.cpp

Index: Source/core/animation/Animation.cpp
diff --git a/Source/core/animation/Animation.cpp b/Source/core/animation/Animation.cpp
index 0de2ba0cda58c67848a765718758ffd935f23558..6488493e4eb68b64dc02c903182231cd5a563a82 100644
--- a/Source/core/animation/Animation.cpp
+++ b/Source/core/animation/Animation.cpp
@@ -41,6 +41,7 @@
 #include "core/animation/Interpolation.h"
 #include "core/animation/KeyframeEffectModel.h"
 #include "core/dom/Element.h"
+#include "core/frame/UseCounter.h"
 #include "core/rendering/RenderLayer.h"
 
 namespace WebCore {
@@ -68,16 +69,19 @@ PassRefPtr<Animation> Animation::create(Element* element, PassRefPtrWillBeRawPtr
 PassRefPtr<Animation> Animation::create(Element* element, const Vector<Dictionary>& keyframeDictionaryVector, const Dictionary& timingInputDictionary, ExceptionState& exceptionState)
 {
     ASSERT(RuntimeEnabledFeatures::webAnimationsAPIEnabled());
+    UseCounter::count(element->document(), UseCounter::AnimationConstructorKeyframeListEffectObjectTiming);
     return create(element, EffectInput::convert(element, keyframeDictionaryVector, exceptionState), TimingInput::convert(timingInputDictionary));
 }
 PassRefPtr<Animation> Animation::create(Element* element, const Vector<Dictionary>& keyframeDictionaryVector, double duration, ExceptionState& exceptionState)
 {
     ASSERT(RuntimeEnabledFeatures::webAnimationsAPIEnabled());
+    UseCounter::count(element->document(), UseCounter::AnimationConstructorKeyframeListEffectDoubleTiming);
     return create(element, EffectInput::convert(element, keyframeDictionaryVector, exceptionState), TimingInput::convert(duration));
 }
 PassRefPtr<Animation> Animation::create(Element* element, const Vector<Dictionary>& keyframeDictionaryVector, ExceptionState& exceptionState)
 {
     ASSERT(RuntimeEnabledFeatures::webAnimationsAPIEnabled());
+    UseCounter::count(element->document(), UseCounter::AnimationConstructorKeyframeListEffectNoTiming);
     return create(element, EffectInput::convert(element, keyframeDictionaryVector, exceptionState), Timing());
 }