Avoid N^2 walk placing renderers when building the render tree

Source/core/dom/ScriptElement.cpp

Index: Source/core/dom/ScriptElement.cpp
diff --git a/Source/core/dom/ScriptElement.cpp b/Source/core/dom/ScriptElement.cpp
index b2c13ae43da8b6111dbca7627fdec7c76871bc73..b9d68d8cb643730459000801117343c37cb9e766 100644
--- a/Source/core/dom/ScriptElement.cpp
+++ b/Source/core/dom/ScriptElement.cpp
@@ -77,10 +77,16 @@ ScriptElement::~ScriptElement()
     stopLoadRequest();
 }
 
+void ScriptElement::prepareScriptCallback(Element* element)
+{
+    ASSERT(toScriptElementIfPossible(element));
+    toScriptElementIfPossible(element)->prepareScript();
+}
+
 void ScriptElement::insertedInto(ContainerNode* insertionPoint)
 {
     if (insertionPoint->inDocument() && !m_parserInserted)
-        prepareScript(); // FIXME: Provide a real starting line number here.
+        ContainerNode::queueInsertionCallback(prepareScriptCallback, m_element); // FIXME: Provide a real starting line number here.
 }
 
 void ScriptElement::childrenChanged()