Web Animations: Coalesce constructors where possible.

third_party/WebKit/Source/core/animation/KeyframeEffect.h

Index: third_party/WebKit/Source/core/animation/KeyframeEffect.h
diff --git a/third_party/WebKit/Source/core/animation/KeyframeEffect.h b/third_party/WebKit/Source/core/animation/KeyframeEffect.h
index 8f0e61a5925f1dd0340479db8712ef4bd095aef7..e496fbe4c38b43cc9b45e4b07923e8e728756888 100644
--- a/third_party/WebKit/Source/core/animation/KeyframeEffect.h
+++ b/third_party/WebKit/Source/core/animation/KeyframeEffect.h
@@ -40,7 +40,7 @@ namespace blink {
 
 class Element;
 class ExceptionState;
-class KeyframeEffectOptions;
+class UnrestrictedDoubleOrKeyframeEffectOptions;
 
 // Represents the effect of an Animation on an Element's properties.
 // http://w3c.github.io/web-animations/#keyframe-effect
@@ -59,13 +59,7 @@ class CORE_EXPORT KeyframeEffect final : public KeyframeEffectReadOnly {
       ExecutionContext*,
       Element*,
       const DictionarySequenceOrDictionary& effect_input,
-      double duration,
-      ExceptionState&);
-  static KeyframeEffect* Create(
-      ExecutionContext*,
-      Element*,
-      const DictionarySequenceOrDictionary& effect_input,
-      const KeyframeEffectOptions& timing_input,
+      const UnrestrictedDoubleOrKeyframeEffectOptions&,
       ExceptionState&);
   static KeyframeEffect* Create(
       ExecutionContext*,