Merge 132724

Source/WebCore/svg/SVGAnimationElement.cpp

Index: Source/WebCore/svg/SVGAnimationElement.cpp
===================================================================
--- Source/WebCore/svg/SVGAnimationElement.cpp	(revision 132837)
+++ Source/WebCore/svg/SVGAnimationElement.cpp	(working copy)
@@ -39,6 +39,7 @@
 #include "SVGNames.h"
 #include "SVGParserUtilities.h"
 #include "SVGStyledElement.h"
+#include <wtf/MathExtras.h>
 
 namespace WebCore {
 
@@ -240,6 +241,8 @@
 
 void SVGAnimationElement::beginElementAt(float offset)
 {
+    if (isnan(offset))
+        return;
     SMILTime elapsed = this->elapsed();
     addBeginTime(elapsed, elapsed + offset, SMILTimeWithOrigin::ScriptOrigin);
 }
@@ -251,6 +254,8 @@
 
 void SVGAnimationElement::endElementAt(float offset)
 {
+    if (isnan(offset))
+        return;
     SMILTime elapsed = this->elapsed();
     addEndTime(elapsed, elapsed + offset, SMILTimeWithOrigin::ScriptOrigin);
 }