Throw TypeError if easing string is invalid.

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef AnimationEffectTiming_h
 #define AnimationEffectTiming_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/animation/AnimationEffect.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
+class ExceptionState;
 class UnrestrictedDoubleOrString;
 
 class CORE_EXPORT AnimationEffectTiming : public GarbageCollected<AnimationEffectTiming>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static AnimationEffectTiming* create(AnimationEffect* parent);
     double delay();
     double endDelay();
     String fill();
     double iterationStart();
     double iterations();
     void duration(UnrestrictedDoubleOrString&);
     double playbackRate();
     String direction();
     String easing();
 
     void setDelay(double);
     void setEndDelay(double);
     void setFill(String);
     void setIterationStart(double);
     void setIterations(double);
     void setDuration(const UnrestrictedDoubleOrString&);
     void setPlaybackRate(double);
     void setDirection(String);
-    void setEasing(String);
+    void setEasing(String, ExceptionState&);
 
     DECLARE_TRACE();
 
 private:
     Member<AnimationEffect> m_parent;
     explicit AnimationEffectTiming(AnimationEffect*);
 };
 
 } // namespace blink
 
 #endif