Fix for input/datalist failure when datalist is created outside document

Source/core/dom/ContainerNode.cpp

Index: Source/core/dom/ContainerNode.cpp
diff --git a/Source/core/dom/ContainerNode.cpp b/Source/core/dom/ContainerNode.cpp
index 6d8dc594f20539c21e4f8d93fbd9c4eee9d1dbf5..ab5730fc585d2ee2f73f2cd267b65b419f6a6d78 100644
--- a/Source/core/dom/ContainerNode.cpp
+++ b/Source/core/dom/ContainerNode.cpp
@@ -44,6 +44,7 @@
 #include "core/events/MutationEvent.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLFrameOwnerElement.h"
+#include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLTagCollection.h"
 #include "core/html/RadioNodeList.h"
 #include "core/inspector/InspectorInstrumentation.h"
@@ -780,6 +781,9 @@ void ContainerNode::notifyNodeInserted(Node& root)
     NodeVector postInsertionNotificationTargets;
     notifyNodeInsertedInternal(root, postInsertionNotificationTargets);
 
+    if (isHTMLInputElement(root) && toHTMLInputElement(root).dataList())
+        toHTMLInputElement(root).listAttributeTargetChanged();

[esprehn, 2014/07/16 19:43:49]

I think you might want to use didNotifySubtreeInsertionsToDocument()?

+
     for (size_t i = 0; i < postInsertionNotificationTargets.size(); ++i) {
         Node* targetNode = postInsertionNotificationTargets[i].get();
         if (targetNode->inDocument())