Transfer pending async script loader to new document.

Source/core/html/HTMLScriptElement.cpp

Index: Source/core/html/HTMLScriptElement.cpp
diff --git a/Source/core/html/HTMLScriptElement.cpp b/Source/core/html/HTMLScriptElement.cpp
index 0f6df59e2b67121999ac3b75434457a6e97cbaa4..b95da30566f265e2ee01c80206b1bf2fb71d00ee 100644
--- a/Source/core/html/HTMLScriptElement.cpp
+++ b/Source/core/html/HTMLScriptElement.cpp
@@ -30,6 +30,7 @@
 #include "core/dom/Attribute.h"
 #include "core/dom/Document.h"
 #include "core/dom/ScriptLoader.h"
+#include "core/dom/ScriptRunner.h"
 #include "core/dom/Text.h"
 #include "core/events/Event.h"
 
@@ -70,6 +71,12 @@ void HTMLScriptElement::childrenChanged(const ChildrenChange& change)
     m_loader->childrenChanged();
 }
 
+void HTMLScriptElement::didMoveToNewDocument(Document& oldDocument)
+{
+    oldDocument.scriptRunner()->movePendingAsyncScript(document().scriptRunner(), m_loader.get());
+    HTMLElement::didMoveToNewDocument(oldDocument);
+}
+
 void HTMLScriptElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == srcAttr)