Revalidate SMIL animation value after target change

third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp

Index: third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp
diff --git a/third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp b/third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp
index 02e3d662659dfa8c27b9f901cfd8be8e860dd3fa..9f52f11b9453d9e1cc4ae6287fcbcff364f7f8b5 100644
--- a/third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp
+++ b/third_party/WebKit/Source/core/svg/animation/SVGSMILElement.cpp
@@ -615,6 +615,11 @@ void SVGSMILElement::setTargetElement(SVGElement* target) {
 
   m_targetElement = target;
   didChangeAnimationTarget();
+
+  // If the animation is scheduled and there's an active interval, then
+  // revalidate the animation value.
+  if (m_activeState != Inactive && m_isScheduled)
+    startedActiveInterval();
 }
 
 SMILTime SVGSMILElement::elapsed() const {