Merge 139100

Source/WebCore/dom/Element.cpp

Index: Source/WebCore/dom/Element.cpp
===================================================================
--- Source/WebCore/dom/Element.cpp	(revision 139656)
+++ Source/WebCore/dom/Element.cpp	(working copy)
@@ -739,7 +739,7 @@
         // If there is an Attr node hooked to this attribute, the Attr::setValue() call below
         // will write into the ElementAttributeData.
         // FIXME: Refactor this so it makes some sense.
-        if (RefPtr<Attr> attrNode = attrIfExists(name))
+        if (RefPtr<Attr> attrNode = inSynchronizationOfLazyAttribute ? 0 : attrIfExists(name))
             attrNode->setValue(newValue);
         else
             mutableAttributeData()->attributeItem(index)->setValue(newValue);