Move pending async script to the correct resolved document.

Source/core/svg/SVGScriptElement.cpp

Index: Source/core/svg/SVGScriptElement.cpp
diff --git a/Source/core/svg/SVGScriptElement.cpp b/Source/core/svg/SVGScriptElement.cpp
index aed347235f0873f06885603424445d49e6afde42..5ab4c0d2d457467d749b8a5cb93e8c803dc13b02 100644
--- a/Source/core/svg/SVGScriptElement.cpp
+++ b/Source/core/svg/SVGScriptElement.cpp
@@ -126,7 +126,8 @@ void SVGScriptElement::childrenChanged(const ChildrenChange& change)
 
 void SVGScriptElement::didMoveToNewDocument(Document& oldDocument)
 {
-    oldDocument.scriptRunner()->movePendingAsyncScript(document().scriptRunner(), m_loader.get());
+    if (RefPtrWillBeRawPtr<Document> contextDocument = document().contextDocument().get())
+        oldDocument.scriptRunner()->movePendingAsyncScript(contextDocument->scriptRunner(), m_loader.get());
     SVGElement::didMoveToNewDocument(oldDocument);
 }