Throw TypeError if easing string is invalid.

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

 // 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.
 
 #include "core/animation/AnimationEffectTiming.h"
 
+#include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/UnionTypesCore.h"
 #include "core/animation/AnimationEffect.h"
 #include "core/animation/KeyframeEffect.h"
 #include "platform/animation/TimingFunction.h"
 
 namespace blink {
 
 AnimationEffectTiming* AnimationEffectTiming::create(AnimationEffect* parent)
 {
     return new AnimationEffectTiming(parent);
@@ skipping 103 matching lines @@
     m_parent->updateSpecifiedTiming(timing);
 }
 
 void AnimationEffectTiming::setDirection(String direction)
 {
     Timing timing = m_parent->specifiedTiming();
     TimingInput::setPlaybackDirection(timing, direction);
     m_parent->updateSpecifiedTiming(timing);
 }
 
-void AnimationEffectTiming::setEasing(String easing)
+void AnimationEffectTiming::setEasing(String easing, ExceptionState& exceptionState)
 {
     Timing timing = m_parent->specifiedTiming();
-    TimingInput::setTimingFunction(timing, easing);
-    m_parent->updateSpecifiedTiming(timing);
+    if (TimingInput::setTimingFunction(timing, easing, exceptionState))
+        m_parent->updateSpecifiedTiming(timing);
 }
 
 DEFINE_TRACE(AnimationEffectTiming)
 {
     visitor->trace(m_parent);
 }
 
 } // namespace blink