Debug printf

Source/core/html/HTMLMarqueeElement.cpp

Index: Source/core/html/HTMLMarqueeElement.cpp
diff --git a/Source/core/html/HTMLMarqueeElement.cpp b/Source/core/html/HTMLMarqueeElement.cpp
index c17fa69bf2205585b1e89b5c9ca30a54cabbc9da..55f2ff2424cdea7c81b23148db2b254541d8225a 100644
--- a/Source/core/html/HTMLMarqueeElement.cpp
+++ b/Source/core/html/HTMLMarqueeElement.cpp
@@ -54,6 +54,10 @@ void HTMLMarqueeElement::attributeWillChange(const QualifiedName& name, const At
 
 Node::InsertionNotificationRequest HTMLMarqueeElement::insertedInto(ContainerNode* insertionPoint)
 {
+    Element* e = insertionPoint->isElementNode() ? toElement(insertionPoint) : nullptr;
+    printf("HTMLMarqueeElement::insertedInto this:%p insertedto:%p (%s)\n", this, insertionPoint,
+           e ? e->tagName().utf8().data() : "");
+    fflush(stdout);
     HTMLElement::insertedInto(insertionPoint);
     if (inDocument()) {
         V8HTMLMarqueeElement::PrivateScript::attachedCallbackMethod(document().frame(), this);
@@ -63,6 +67,10 @@ Node::InsertionNotificationRequest HTMLMarqueeElement::insertedInto(ContainerNod
 
 void HTMLMarqueeElement::removedFrom(ContainerNode* insertionPoint)
 {
+    Element* e = insertionPoint->isElementNode() ? toElement(insertionPoint) : nullptr;
+    printf("HTMLMarqueeElement::removedFrom this:%p from:%p (%s)\n", this, insertionPoint,
+           e ? e->tagName().utf8().data() : "");
+    fflush(stdout);
     HTMLElement::removedFrom(insertionPoint);
     if (insertionPoint->inDocument()) {
         V8HTMLMarqueeElement::PrivateScript::detachedCallbackMethod(insertionPoint->document().frame(), this);