Add AnimationTimingProperties dictionary

Source/core/animation/EffectInput.cpp

Index: Source/core/animation/EffectInput.cpp
diff --git a/Source/core/animation/EffectInput.cpp b/Source/core/animation/EffectInput.cpp
index 4375e7fc0fab98ce54032ab3a2001ebe268c0955..3bf7a06a9d56c7b7ba24f6e3545ed0da1ecafa8b 100644
--- a/Source/core/animation/EffectInput.cpp
+++ b/Source/core/animation/EffectInput.cpp
@@ -32,6 +32,7 @@
 #include "core/animation/EffectInput.h"
 
 #include "bindings/core/v8/Dictionary.h"
+#include "bindings/core/v8/UnionTypesCore.h"
 #include "core/animation/AnimationInputHelpers.h"
 #include "core/animation/KeyframeEffectModel.h"
 #include "core/animation/StringKeyframe.h"
@@ -120,4 +121,13 @@ PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, c
     return keyframeEffectModel;
 }
 
+PassRefPtrWillBeRawPtr<AnimationEffect> EffectInput::convert(Element* element, const AnimationEffectOrDictionarySequence& effectInput, ExceptionState& exceptionState)
+{
+    if (effectInput.isAnimationEffect())
+        return effectInput.getAsAnimationEffect();
+    if (effectInput.isDictionarySequence())
+        return convert(element, effectInput.getAsDictionarySequence(), exceptionState);
+    return nullptr;
+}
+
 } // namespace blink