Hoist target element null-checks out of SVGAnimateElement::calculate*

third_party/WebKit/Source/core/svg/SVGAnimationElement.cpp

Index: third_party/WebKit/Source/core/svg/SVGAnimationElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/SVGAnimationElement.cpp b/third_party/WebKit/Source/core/svg/SVGAnimationElement.cpp
index 76645345a9786e441d438af36fff1fa94f73bd0c..089185dbd7dcdb72a9f054c1b1cd01a3468c19ae 100644
--- a/third_party/WebKit/Source/core/svg/SVGAnimationElement.cpp
+++ b/third_party/WebKit/Source/core/svg/SVGAnimationElement.cpp
@@ -573,7 +573,8 @@ void SVGAnimationElement::startedActiveInterval() {
 
   if (!isValid())
     return;
-
+  if (!targetElement())
+    return;
   if (!hasValidAttributeType())
     return;
 
@@ -649,7 +650,7 @@ void SVGAnimationElement::startedActiveInterval() {
 void SVGAnimationElement::updateAnimation(float percent,
                                           unsigned repeatCount,
                                           SVGSMILElement* resultElement) {
-  if (!m_animationValid)
+  if (!m_animationValid || !targetElement())
     return;
 
   float effectivePercent;