Fix keyTimes list length of from/to/by animations.

Source/core/svg/SVGAnimationElement.cpp

Index: Source/core/svg/SVGAnimationElement.cpp
diff --git a/Source/core/svg/SVGAnimationElement.cpp b/Source/core/svg/SVGAnimationElement.cpp
index e2a27a7ab7313302fb8b8ee61274063a0c03a709..7c707fdd786bfb0ff9d30ed1a7aafd2f921fc111 100644
--- a/Source/core/svg/SVGAnimationElement.cpp
+++ b/Source/core/svg/SVGAnimationElement.cpp
@@ -572,6 +572,9 @@ void SVGAnimationElement::startedActiveInterval()
     String by = byValue();
     if (animationMode == NoAnimation)
         return;
+    if ((animationMode == FromToAnimation || animationMode == FromByAnimation || animationMode == ToAnimation || animationMode == ByAnimation)
+        && (fastHasAttribute(SVGNames::keyPointsAttr) && fastHasAttribute(SVGNames::keyTimesAttr) && (m_keyTimes.size() < 2 || m_keyTimes.size() != m_keyPoints.size())))
+        return;
     if (animationMode == FromToAnimation)
         m_animationValid = calculateFromAndToValues(from, to);
     else if (animationMode == ToAnimation) {